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673 lines
364 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="G11C" definition-exists="true" date-revised="2023-02-01" status="published"><classification-symbol>G11C</classification-symbol><class-title date-revised="2023-02-01"><title-part><text>STATIC STORES </text><reference><text>semiconductor memory devices <class-ref scheme="cpc">H10B</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This subclass <u>covers</u> devices or arrangements for storage of digital or analogue information:<subnote type="bullet"><note-paragraph>in which no relative movement takes place between an information storage element and a transducer;</note-paragraph><note-paragraph>which incorporate a selecting-device for writing-in or reading-out the information into or from the store.</note-paragraph></subnote></note-paragraph><note-paragraph>This subclass <u>does not cover</u> elements not adapted for storage and not provided with such means as referred to in Note (3) below, which elements are classified in the appropriate subclass, e.g. of <class-ref scheme="cpc">H01</class-ref>, <class-ref scheme="cpc">H03K</class-ref>.</note-paragraph><note-paragraph> In this subclass, the following terms are used with the meaning indicated: <subnote type="bullet"><note-paragraph>"storage element" is an element which can hold at least one item of information and is provided with means for writing-in or reading-out this information; </note-paragraph><note-paragraph> "memory" is a device, including storage elements, which can hold information to be extracted when desired. </note-paragraph></subnote></note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">G11C8/02</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G11C8/00</class-ref>, <class-ref scheme="cpc">H03K17/00</class-ref></entry></row><row><entry><class-ref scheme="ipc">G11C11/4193</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G11C11/00</class-ref></entry></row><row><entry><class-ref scheme="ipc">G11C11/4195</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G11C11/00</class-ref></entry></row><row><entry><class-ref scheme="ipc">G11C11/4197</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G11C11/00</class-ref></entry></row></table></note-paragraph><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="G11C5/00" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C5/00" definition-exists="true" ipc-concordant="G11C5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Details of stores covered by group <class-ref scheme="cpc">G11C11/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C5/005" definition-exists="true" ipc-concordant="G11C5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/005</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Circuit means for protection against loss of information of semiconductor storage devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C5/02" definition-exists="false" ipc-concordant="G11C5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disposition of storage elements, e.g. in the form of a matrix array</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/025" definition-exists="true" ipc-concordant="G11C5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Geometric lay-out considerations of storage- and peripheral-blocks in a semiconductor storage device </text><reference><text>geometrical lay-out of the components in integrated circuits, <class-ref scheme="cpc">H01L27/0207</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/04" definition-exists="true" ipc-concordant="G11C5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C5/04</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Supports for storage elements </text><CPC-specific-text><text>, e.g. memory modules</text></CPC-specific-text></title-part><title-part><text>Mounting or fixing of storage elements on such supports</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C5/05" definition-exists="false" ipc-concordant="G11C5/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supporting of cores in matrix</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C5/06" definition-exists="false" ipc-concordant="G11C5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for interconnecting storage elements electrically, e.g. by wiring</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/063" definition-exists="false" ipc-concordant="G11C5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Voltage and signal distribution in integrated semi-conductor memory access lines, e.g. word-line, bit-line, cross-over resistance, propagation delay</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/066" definition-exists="false" ipc-concordant="G11C5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11C5/066</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Means for reducing external access-lines for a semiconductor memory clip, e.g. by multiplexing at least address and data signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/08" definition-exists="false" ipc-concordant="G11C5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for interconnecting magnetic elements, e.g. toroidal cores</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/10" definition-exists="false" ipc-concordant="G11C5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for interconnecting capacitors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C5/12" definition-exists="false" ipc-concordant="G11C5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or processes for interconnecting storage elements, e.g. for threading magnetic cores</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C5/14" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/14</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Power supply arrangements </text><CPC-specific-text><text>, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/141" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/141</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Battery and back-up supplies</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/142" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/142</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Contactless power supplies, e.g. RF, induction, or IR</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/143" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/143</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Detection of memory cassette insertion or removal; Continuity checks of supply or ground lines; Detection of supply variations, interruptions or levels </text><reference><text><class-ref scheme="cpc">G11C5/148</class-ref> takes precedence</text></reference><text>; Switching between alternative supplies </text><reference><text><class-ref scheme="cpc">G11C5/141</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C5/144" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection of predetermined disconnection or reduction of power supply, e.g. power down or power standby</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/145" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/145</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Applications of charge pumps; Boosted voltage circuits; Clamp circuits therefor </text><reference><text><class-ref scheme="cpc">G11C5/141</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C5/146" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/146</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Substrate bias generators </text><reference><text><class-ref scheme="cpc">G11C5/141</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/147" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C5/147</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Voltage reference generators, voltage or current regulators; Internally lowered supply levels; Compensation for voltage drops </text><reference><text><class-ref scheme="cpc">G11C5/141</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C5/148" definition-exists="true" ipc-concordant="G11C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C5/148</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of power up or power down circuits, standby circuits or recovery circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C7/00" definition-exists="true" ipc-concordant="G11C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C7/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Arrangements for writing information into, or reading information out from, a digital store </text><reference><text><class-ref scheme="cpc">G11C5/00</class-ref> takes precedence; auxiliary circuits for stores using semiconductor devices <class-ref scheme="cpc">G11C11/4063</class-ref>, <class-ref scheme="cpc">G11C11/413</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/005" definition-exists="false" ipc-concordant="G11C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with combined beam-and individual cell access</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/02" definition-exists="true" ipc-concordant="G11C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11C7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for avoiding parasitic signals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/04" definition-exists="true" ipc-concordant="G11C7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11C7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for avoiding disturbances due to temperature effects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/06" definition-exists="true" ipc-concordant="G11C7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C7/06</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Sense amplifiers</text></title-part><title-part><text>Associated circuits </text><CPC-specific-text><text>, e.g. timing or triggering circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/062" definition-exists="true" ipc-concordant="G11C7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Differential amplifiers of non-latching type, e.g. comparators, long-tailed pairs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/065" definition-exists="false" ipc-concordant="G11C7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Differential amplifiers of latching type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/067" definition-exists="false" ipc-concordant="G11C7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single-ended amplifiers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/08" definition-exists="true" ipc-concordant="G11C7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11C7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control thereof</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/10" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C7/10</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/1003" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interface circuits for daisy chain or ring bus memory arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/1006" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data managing, e.g. manipulating data before writing or reading out, data bus switches or control circuits therefor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1009" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data masking during input/output</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1012" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data reordering during input/output, e.g. crossbars, layers of multiplexers, shifting or rotating</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/1015" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read-write modes for single port memories, i.e. having either a random port or a serial port</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1018" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Serial bit line access mode, e.g. using bit line address shift registers, bit line address counters, bit line burst counters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C7/1021" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Page serial bit line access mode, i.e. using an enabled row address stroke pulse with its associated word line address and a sequence of enabled column address stroke pulses each with its associated bit line address</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C7/1024" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Extended data output [EDO] mode, i.e. keeping output buffer enabled during an extended period of time</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C7/1027" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Static column decode serial bit line access mode, i.e. using an enabled row address stroke pulse with its associated word line address and a sequence of enabled bit line addresses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/103" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using serially addressed read-write data registers </text><reference><text><class-ref scheme="cpc">G11C7/1036</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C7/1033" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using data registers of which only one stage is addressed for sequentially outputting data from a predetermined number of stages, e.g. nibble read-write mode</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1036" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using data shift registers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1039" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1039</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pipelining techniques, i.e. using latches between functional memory parts, e.g. row/column decoders, I/O buffers, sense amplifiers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1042" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using interleaving techniques, i.e. read-write of one part of the memory while preparing another part</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1045" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read-write mode select circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/1048" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data bus control circuits, e.g. precharging, presetting, equalising</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/1051" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1054" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical output buffers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1057" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data output buffers, e.g. comprising level conversion circuits, circuits for adapting load</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/106" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data output latches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1063" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control signal output circuits, e.g. status or busy flags, feedback command signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1066" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Output synchronization</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1069" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C7/1069</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>I/O lines read out arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/1072" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for memories with random access ports synchronised on clock signal pulse trains, e.g. synchronous memories, self timed memories</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/1075" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for multiport memories each having random access ports and serial ports, e.g. video RAM</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/1078" definition-exists="true" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data input circuits, e.g. write amplifiers, data input buffers, data input registers, data input level conversion circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1081" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical input buffers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1084" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data input buffers, e.g. comprising level conversion circuits, circuits for adapting load</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1087" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data input latches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/109" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/109</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control signal input circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1093" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Input synchronization</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C7/1096" definition-exists="false" ipc-concordant="G11C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/1096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write circuits, e.g. I/O line write drivers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/12" definition-exists="false" ipc-concordant="G11C7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bit line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, equalising circuits, for bit lines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/14" definition-exists="false" ipc-concordant="G11C7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dummy cell management</text></title-part><title-part><text>Sense reference voltage generators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/16" definition-exists="true" ipc-concordant="G11C7/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C7/16</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Storage of analogue signals in digital stores using an arrangement comprising analogue/digital [A/D] converters, digital memories and digital/analogue [D/A] converters </text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/18" definition-exists="false" ipc-concordant="G11C7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bit line organisation</text></title-part><title-part><text>Bit line lay-out</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/20" definition-exists="false" ipc-concordant="G11C7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C7/20</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Memory cell initialisation circuits, e.g. when powering up or down, memory clear, latent image memory</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/22" definition-exists="true" ipc-concordant="G11C7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C7/22</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Read-write [R-W] timing or clocking circuits</text></title-part><title-part><text>Read-write [R-W] control signal generators or management </text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/222" definition-exists="false" ipc-concordant="G11C7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clock generating, synchronizing or distributing circuits within memory device</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/225" definition-exists="false" ipc-concordant="G11C7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clock input buffers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C7/227" definition-exists="false" ipc-concordant="G11C7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Timing of memory operations based on dummy memory elements or replica circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C7/24" definition-exists="false" ipc-concordant="G11C7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C7/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing</text></title-part><title-part><text>Status cells</text></title-part><title-part><text>Test cells</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C8/00" definition-exists="true" ipc-concordant="G11C8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C8/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Arrangements for selecting an address in a digital store </text><reference><text>for stores using transistors <class-ref scheme="cpc">G11C11/407</class-ref>, <class-ref scheme="cpc">G11C11/413</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/005" definition-exists="false" ipc-concordant="G11C8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C8/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with travelling wave access</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/04" definition-exists="true" ipc-concordant="G11C8/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C8/04</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using a sequential addressing device, e.g. shift register, counter</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/06" definition-exists="true" ipc-concordant="G11C8/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C8/06</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Address interface arrangements, e.g. address buffers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/08" definition-exists="true" ipc-concordant="G11C8/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C8/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Word line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, for word lines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/10" definition-exists="true" ipc-concordant="G11C8/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C8/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Decoders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/12" definition-exists="false" ipc-concordant="G11C8/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C8/12</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Group selection circuits, e.g. for memory block selection, chip selection, array selection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/14" definition-exists="true" ipc-concordant="G11C8/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C8/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Word line organisation</text></title-part><title-part><text>Word line lay-out</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/16" definition-exists="true" ipc-concordant="G11C8/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C8/16</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Multiple access memory array, e.g. addressing one storage element via at least two independent addressing line groups</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/18" definition-exists="true" ipc-concordant="G11C8/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C8/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Address timing or clocking circuits</text></title-part><title-part><text>Address control signal generation or management, e.g. for row address strobe [RAS] or column address strobe [CAS] signals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C8/20" definition-exists="false" ipc-concordant="G11C8/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C8/20</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Address safety or protection circuits, i.e. arrangements for preventing unauthorized or accidental access</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C11/00" definition-exists="true" ipc-concordant="G11C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11C11/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Digital stores characterised by the use of particular electric or magnetic storage elements</text></title-part><title-part><text>Storage elements therefor </text><reference><text><class-ref scheme="cpc">G11C14/00</class-ref> - <class-ref scheme="cpc">G11C21/00</class-ref> take precedence</text></reference></title-part></class-title><notes-and-warnings><note type="note"><note-paragraph>Group <class-ref scheme="cpc">G11C11/56</class-ref> takes precedence over groups <class-ref scheme="cpc">G11C11/02</class-ref> - <class-ref scheme="cpc">G11C11/54</class-ref>.<br/><CPC-specific-note>This Note corresponds to IPC Note (1) relating to <class-ref scheme="cpc">G11C11/02</class-ref> - <class-ref scheme="cpc">G11C11/56</class-ref>.</CPC-specific-note></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/005" definition-exists="true" ipc-concordant="G11C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11C11/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising combined but independently operative RAM-ROM, RAM-PROM, RAM-EPROM cells</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/02" definition-exists="true" ipc-concordant="G11C11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/02</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using magnetic elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/04" definition-exists="true" ipc-concordant="G11C11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/04</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using storage elements having cylindrical form, e.g. rod, wire </text><reference><text><class-ref scheme="cpc">G11C11/12</class-ref>, <class-ref scheme="cpc">G11C11/14</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/06" definition-exists="true" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using single-aperture storage elements, e.g. ring core</text></title-part><title-part><text>using multi-aperture plates in which each individual aperture forms a storage element</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/06007" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a single aperture or single magnetic closed circuit</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Provisionally contains the following details; control write -, read -, address circuitry (pulse generators in general <class-ref scheme="cpc">H03K5/00</class-ref>, <class-ref scheme="cpc">H03K17/00</class-ref> ); arrangements for temperature compensation; checking of the correct functioning and repair arrangements (checking methods in general <class-ref scheme="cpc">G06F11/00</class-ref>, <class-ref scheme="cpc">G06F11/28</class-ref>; testing magnetic elements <u>per se</u> <class-ref scheme="cpc">G01R33/00</class-ref> ); magnetic properties, choice of materials or the like (materials <u>per se</u> <class-ref scheme="cpc">H01F1/00</class-ref> ) </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/06014" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C11/06014</classification-symbol><class-title date-revised="2018-05-01"><title-part><CPC-specific-text><text>using one such element per bit</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/06021" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with destructive read-out</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/06028" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Matrixes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/06035" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/06035</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Bit core selection for writing or reading, by at least two coincident partial currents, e.g. "bit"- organised, 2L/2D, or 3D</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/06042" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>"word"-organised, e.g. 2D organisation or linear selection, i.e. full current selection through all the bit-cores of a word during reading</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/0605" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/0605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with non-destructive read-out</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/06057" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Matrixes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/06064" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>"bit"-organised (2 1/2D, 3D or similar organisation)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/06071" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>"word"-organised (2D organisation or linear selection)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/06078" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/06078</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>using two or more such elements per bit</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/06085" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-aperture structures or multi-magnetic closed circuits, each aperture storing a "bit", realised by rods, plates, grids, waffle-irons,(i.e. grooved plates) or similar devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/06092" definition-exists="false" ipc-concordant="G11C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/06092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-aperture structures or multi-magnetic closed circuits using two or more apertures per bit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/061" definition-exists="false" ipc-concordant="G11C11/061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11C11/061</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>using elements with single aperture or magnetic loop for storage, one element per bit, and for destructive read-out </text><CPC-specific-text><reference><text>contains no documents, <u>see</u> <class-ref scheme="cpc">G11C11/06007</class-ref>, <class-ref scheme="cpc">G11C11/06014</class-ref>, <class-ref scheme="cpc">G11C11/06021</class-ref>, <class-ref scheme="cpc">G11C11/06028</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/063" definition-exists="false" ipc-concordant="G11C11/063" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11C11/063</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>bit organised, such as 2 1/2D, 3D organisation, i.e. for selection of an element by means of at least two coincident partial currents both for reading and for writing </text><CPC-specific-text><reference><text>contains no documents; <u>see</u> <class-ref scheme="cpc">G11C11/06035</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/065" definition-exists="false" ipc-concordant="G11C11/065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>word organised, such as 2D organisation, or linear selection, i.e. for selection of all the elements of a word by means of a single full current for reading </text><CPC-specific-text><reference><text>contains no documents; <u>see</u> <class-ref scheme="cpc">G11C11/06042</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/067" definition-exists="false" ipc-concordant="G11C11/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11C11/067</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>using elements with single aperture or magnetic loop for storage, one element per bit, and for non-destructive read-out </text><CPC-specific-text><reference><text>contains no documents, <u>see</u> <class-ref scheme="cpc">G11C11/0605</class-ref> - <class-ref scheme="cpc">G11C11/06071</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/08" definition-exists="true" ipc-concordant="G11C11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/08</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using multi-aperture storage elements, e.g. using transfluxors</text></title-part><title-part><text>using plates incorporating several individual multi-aperture storage elements </text><reference><text><class-ref scheme="cpc">G11C11/10</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/10" definition-exists="false" ipc-concordant="G11C11/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multi-axial storage elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/12" definition-exists="false" ipc-concordant="G11C11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using tensors</text></title-part><title-part><text>using twistors, i.e. elements in which one axis of magnetisation is twisted</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/14" definition-exists="true" ipc-concordant="G11C11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thin-film elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/15" definition-exists="true" ipc-concordant="G11C11/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multiple magnetic layers </text><reference><text><class-ref scheme="cpc">G11C11/155</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/155" definition-exists="false" ipc-concordant="G11C11/155" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/155</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cylindrical configuration</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/16" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/16</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using elements in which the storage effect is based on magnetic spin effect</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/161" definition-exists="false" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/161</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>details concerning the memory cell structure, e.g. the layers of the ferromagnetic memory cell</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/165" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/1653" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1653</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address circuits or decoders</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/1655" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1655</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bit-line or column circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/1657" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Word-line or row circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/1659" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1659</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell access</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/1673" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reading or sensing circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/1675" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1675</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Writing or programming circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/1677" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1677</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Verifying circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/1693" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1693</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Timing circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/1695" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1695</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/1697" definition-exists="true" ipc-concordant="G11C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/1697</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Power supply circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/18" definition-exists="false" ipc-concordant="G11C11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using Hall-effect devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/19" definition-exists="false" ipc-concordant="G11C11/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11C11/19</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>using non-linear reactive devices in resonant circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/20" definition-exists="true" ipc-concordant="G11C11/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/20</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using parametrons</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/21" definition-exists="false" ipc-concordant="G11C11/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electric elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/22" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/22</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using ferroelectric elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/221" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using ferroelectric capacitors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/223" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using MOS with ferroelectric gate insulating film</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/225" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/2253" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2253</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address circuits or decoders</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/2255" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bit-line or column circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/2257" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Word-line or row circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/2259" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2259</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell access</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/2273" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reading or sensing circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/2275" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Writing or programming circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/2277" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Verifying circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/2293" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2293</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Timing circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/2295" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/2297" definition-exists="true" ipc-concordant="G11C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/2297</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Power supply circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/23" definition-exists="true" ipc-concordant="G11C11/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/23</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using electrostatic storage on a common layer, e.g. Forrester-Haeff tubes </text><CPC-specific-text><text>or William tubes</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G11C11/22</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/24" definition-exists="false" ipc-concordant="G11C11/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using capacitors </text><reference><text><class-ref scheme="cpc">G11C11/22</class-ref> takes precedence; using a combination of semiconductor devices and capacitors <class-ref scheme="cpc">G11C11/34</class-ref>, e.g. <class-ref scheme="cpc">G11C11/40</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/26" definition-exists="true" ipc-concordant="G11C11/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/26</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using discharge tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/265" definition-exists="true" ipc-concordant="G11C11/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/265</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>counting tubes, e.g. decatrons or trochotrons</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/28" definition-exists="true" ipc-concordant="G11C11/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/28</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using gas-filled tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/30" definition-exists="true" ipc-concordant="G11C11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/30</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using vacuum tubes </text><reference><text><class-ref scheme="cpc">G11C11/23</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/34" definition-exists="true" ipc-concordant="G11C11/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/34</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using semiconductor devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/35" definition-exists="true" ipc-concordant="G11C11/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/35</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>with charge storage in a depletion layer, e.g. charge coupled devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/36" definition-exists="false" ipc-concordant="G11C11/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11C11/36</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>using diodes, e.g. as threshold elements </text><CPC-specific-text><text>, i.e. diodes assuming a stable ON-stage when driven above their threshold (S- or N-characteristic)</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/38" definition-exists="false" ipc-concordant="G11C11/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using tunnel diodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/39" definition-exists="false" ipc-concordant="G11C11/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thyristors </text><CPC-specific-text><text>or the avalanche or negative resistance type, e.g. PNPN, SCR, SCS, UJT</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/40" definition-exists="false" ipc-concordant="G11C11/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using transistors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/401" definition-exists="true" ipc-concordant="G11C11/401" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C11/401</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>forming cells needing refreshing or charge regeneration, i.e. dynamic cells</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/402" definition-exists="false" ipc-concordant="G11C11/402" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/402</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with charge regeneration individual to each memory cell, i.e. internal refresh</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/4023" definition-exists="false" ipc-concordant="G11C11/402" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using field effect transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/4026" definition-exists="false" ipc-concordant="G11C11/402" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bipolar transistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/403" definition-exists="false" ipc-concordant="G11C11/403" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/403</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with charge regeneration common to a multiplicity of memory cells, i.e. external refresh</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/404" definition-exists="true" ipc-concordant="G11C11/404" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/404</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with one charge-transfer gate, e.g. MOS transistor, per cell</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/4045" definition-exists="false" ipc-concordant="G11C11/404" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G11C11/4045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of serially connected access transistors, each having a storage capacitor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/405" definition-exists="true" ipc-concordant="G11C11/405" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/405</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with three charge-transfer gates, e.g. MOS transistors, per cell</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/406" definition-exists="false" ipc-concordant="G11C11/406" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/406</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Management or control of the refreshing or charge-regeneration cycles</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/40603" definition-exists="false" ipc-concordant="G11C11/406" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/40603</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arbitration, priority and concurrent access to memory cells for read/write or refresh operations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/40607" definition-exists="false" ipc-concordant="G11C11/406" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/40607</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Refresh operations in memory devices with an internal cache or data buffer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/40611" definition-exists="false" ipc-concordant="G11C11/406" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/40611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>External triggering or timing of internal or partially internal refresh operations, e.g. auto-refresh or CAS-before-RAS triggered refresh</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/40615" definition-exists="false" ipc-concordant="G11C11/406" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/40615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Internal triggering or timing of refresh, e.g. hidden refresh, self refresh, pseudo-SRAMs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/40618" definition-exists="false" ipc-concordant="G11C11/406" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/40618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Refresh operations over multiple banks or interleaving</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/40622" definition-exists="false" ipc-concordant="G11C11/406" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/40622</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Partial refresh of memory arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/40626" definition-exists="false" ipc-concordant="G11C11/406" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/40626</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature related aspects of refresh operations</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/4063" definition-exists="false" ipc-concordant="G11C11/4063" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/4067" definition-exists="false" ipc-concordant="G11C11/4067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4067</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for memory cells of the bipolar type</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/407" definition-exists="false" ipc-concordant="G11C11/407" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/407</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for memory cells of the field-effect type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/4072" definition-exists="true" ipc-concordant="G11C11/4072" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/4072</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Circuits for initialization, powering up or down, clearing memory or presetting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/4074" definition-exists="true" ipc-concordant="G11C11/4074" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4074</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Power supply or voltage generation circuits, e.g. bias voltage generators, substrate voltage generators, back-up power, power control circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/4076" definition-exists="true" ipc-concordant="G11C11/4076" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4076</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Timing circuits </text><reference><text>for regeneration management <class-ref scheme="cpc">G11C11/406</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/4078" definition-exists="true" ipc-concordant="G11C11/4078" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4078</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety or protection circuits, e.g. for preventing inadvertent or unauthorised reading or writing</text></title-part><title-part><text>Status cells</text></title-part><title-part><text>Test cells </text><reference><text>protection of memory contents during checking or testing <class-ref scheme="cpc">G11C29/52</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/408" definition-exists="true" ipc-concordant="G11C11/408" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/408</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Address circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4082" definition-exists="true" ipc-concordant="G11C11/408" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address Buffers; level conversion circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4085" definition-exists="true" ipc-concordant="G11C11/408" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Word line control circuits, e.g. word line drivers, - boosters, - pull-up, - pull-down, - precharge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4087" definition-exists="true" ipc-concordant="G11C11/408" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address decoders, e.g. bit - or word line decoders; Multiple line decoders</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/409" definition-exists="false" ipc-concordant="G11C11/409" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C11/409</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Read-write [R-W] circuits </text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4091" definition-exists="true" ipc-concordant="G11C11/4091" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4091</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sense or sense/refresh amplifiers, or associated sense circuitry, e.g. for coupled bit-line precharging, equalising or isolating</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4093" definition-exists="true" ipc-concordant="G11C11/4093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C11/4093</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Input/output [I/O] data interface arrangements, e.g. data buffers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4094" definition-exists="true" ipc-concordant="G11C11/4094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4094</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bit-line management or control circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4096" definition-exists="true" ipc-concordant="G11C11/4096" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C11/4096</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Input/output [I/O] data management or control circuits, e.g. reading or writing circuits, I/O drivers or bit-line switches </text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4097" definition-exists="true" ipc-concordant="G11C11/4097" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4097</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bit-line organisation, e.g. bit-line layout, folded bit lines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11C11/4099" definition-exists="true" ipc-concordant="G11C11/4099" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4099</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dummy cell treatment</text></title-part><title-part><text>Reference voltage generators</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/41" definition-exists="true" ipc-concordant="G11C11/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>forming </text><CPC-specific-text><text>static</text></CPC-specific-text><text> cells with positive feedback, i.e. cells not needing refreshing or charge regeneration, e.g. bistable multivibrator or Schmitt trigger</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/411" definition-exists="false" ipc-concordant="G11C11/411" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/411</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using bipolar transistors only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/4113" definition-exists="false" ipc-concordant="G11C11/411" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4113</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one cell access to base or collector of at least one of said transistors, e.g. via access diodes, access transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/4116" definition-exists="false" ipc-concordant="G11C11/411" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/4116</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one cell access via separately connected emittors of said transistors or via multiple emittors, e.g. T2L, ECL</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/412" definition-exists="true" ipc-concordant="G11C11/412" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/412</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using field-effect transistors only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/4125" definition-exists="true" ipc-concordant="G11C11/412" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/4125</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Cells incorporating circuit means for protecting against loss of information</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C11/413" definition-exists="true" ipc-concordant="G11C11/413" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/413</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing, timing or power reduction</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/414" definition-exists="false" ipc-concordant="G11C11/414" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/414</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for memory cells of the bipolar type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/415" definition-exists="false" ipc-concordant="G11C11/415" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/415</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Address circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/416" definition-exists="false" ipc-concordant="G11C11/416" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C11/416</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Read-write [R-W] circuits </text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C11/417" definition-exists="false" ipc-concordant="G11C11/417" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/417</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for memory cells of the field-effect type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/418" definition-exists="false" ipc-concordant="G11C11/418" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/418</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Address circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11C11/419" definition-exists="false" ipc-concordant="G11C11/419" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C11/419</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Read-write [R-W] circuits</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/42" definition-exists="false" ipc-concordant="G11C11/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/42</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically- coupled </text><CPC-specific-text><text>or feedback-coupled</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/44" definition-exists="true" ipc-concordant="G11C11/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/44</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using super-conductive elements, e.g. cryotron</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/46" definition-exists="false" ipc-concordant="G11C11/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thermoplastic elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/48" definition-exists="true" ipc-concordant="G11C11/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using displaceable coupling elements, e.g. ferromagnetic cores, to produce change between different states of mutual or self-inductance </text><CPC-specific-text><reference><text>contains no documents; <u>see</u> <class-ref scheme="cpc">G11C17/00</class-ref> and subgroups</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/50" definition-exists="true" ipc-concordant="G11C11/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/50</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using actuation of electric contacts to store the information</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/52" definition-exists="false" ipc-concordant="G11C11/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electromagnetic relays</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/54" definition-exists="true" ipc-concordant="G11C11/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using elements simulating biological cells, e.g. neuron</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C11/56" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C11/56</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5607" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5607</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5614" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using conductive bridging RAM [CBRAM] or programming metallization cells [PMC]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5621" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using charge storage in a floating gate</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/5628" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5628</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programming or writing circuits; Data input circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C11/5635" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5635</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Erasing circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C11/5642" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sensing or reading circuits; Data output circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/565" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using capacitive charge storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5657" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using ferroelectric storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5664" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5664</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using organic memory material storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5671" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5671</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using charge trapping in an insulator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5678" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using amorphous/crystalline phase transition storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5685" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using storage elements comprising metal oxide memory material, e.g. perovskites</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C11/5692" definition-exists="true" ipc-concordant="G11C11/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C11/5692</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>read-only digital stores using storage elements with more than two stable states</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C13/00" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C13/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Digital stores characterised by the use of storage elements not covered by groups <class-ref scheme="cpc">G11C11/00</class-ref>, <class-ref scheme="cpc">G11C23/00</class-ref>, or <class-ref scheme="cpc">G11C25/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C13/0002" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C13/0002</classification-symbol><class-title date-revised="2018-05-01"><title-part><CPC-specific-text><text>using resistive RAM [RRAM] elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/0004" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising amorphous/crystalline phase transition cells</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/0007" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising metal oxide memory material, e.g. perovskites</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/0009" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>RRAM elements whose operation depends upon chemical change</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0011" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising conductive bridging RAM [CBRAM] or programming metallization cells [PMCs]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0014" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising cells based on organic memory material</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C13/0016" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising polymers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C13/0019" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising bio-molecules</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/0021" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0023" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address circuits or decoders</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C13/0026" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bit-line or column circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C13/0028" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Word-line or row circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/003" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell access</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0033" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disturbance prevention or evaluation; Refreshing of disturbed memory data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0035" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Evaluating degradation, retention or wearout, e.g. by counting writing cycles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0038" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Power supply circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/004" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reading or sensing circuits or methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0042" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read using differential sensing, e.g. bit line [BL] and bit line bar [BLB]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0045" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read using current through the cell</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0047" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read destroying or disturbing the data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/005" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read using potential difference applied between cell electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0052" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read process characterized by the shape, e.g. form, length, amplitude of the read pulse</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0054" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read is performed on a reference element, e.g. cell, and the reference sensed value is used to compare the sensed value of the selected cell</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0057" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Read done in two steps, e.g. wherein the cell is read twice and one of the two read values serving as a reference value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0059" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Security or protection circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0061" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Timing circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0064" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Verifying circuits or methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0066" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Verify correct writing whilst writing is in progress, e.g. by detecting onset or cessation of current flow in cell and using the detector output to terminate writing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0069" definition-exists="true" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Writing or programming circuits or methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0071" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write using write potential applied to access device gate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0073" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write using bi-directional cell biasing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0076" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write operation performed depending on read result</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0078" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write using current through the cell</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/008" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write by generating heat in the surroundings of the memory material, e.g. thermowrite</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0083" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write to perform initialising, forming process, electro forming or conditioning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0085" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write a page or sector of information simultaneously, e.g. a complete row or word line</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0088" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write with the simultaneous writing of a plurality of cells</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/009" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write using potential difference applied between cell electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0092" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write characterized by the shape, e.g. form, length, amplitude of the write pulse</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C13/0095" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2013/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write using strain induced by, e.g. piezoelectric, thermal effects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/0097" definition-exists="false" ipc-concordant="G11C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/0097</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Erasing, e.g. resetting, circuits or methods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C13/02" definition-exists="true" ipc-concordant="G11C13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C13/02</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using elements whose operation depends upon chemical change </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11C13/0009</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/025" definition-exists="false" ipc-concordant="G11C13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fullerenes, e.g. C60, or nanotubes, e.g. carbon or silicon nanotubes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C13/04" definition-exists="true" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C13/04</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using optical elements </text><CPC-specific-text><text>; using other beam accessed elements, e.g. electron or ion beam</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/041" definition-exists="false" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using photochromic storage elements </text><reference><text><class-ref scheme="cpc">G11C13/042</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/042" definition-exists="true" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C13/042</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>using information stored in the form of interference pattern</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/043" definition-exists="false" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic-optical storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/044" definition-exists="false" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electro-optical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/045" definition-exists="false" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using photochromic storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C13/046" definition-exists="false" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using other storage elements storing information in the form of an interference pattern</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/047" definition-exists="false" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electro-optical elements </text><reference><text><class-ref scheme="cpc">G11C13/042</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/048" definition-exists="false" ipc-concordant="G11C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C13/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using other optical storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C13/06" definition-exists="true" ipc-concordant="G11C13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C13/06</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using magneto-optical elements </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11C13/042</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C14/00" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C14/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Digital stores characterised by arrangements of cells having volatile and non-volatile storage properties for back-up when the power is down</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C14/0009" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C14/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the volatile element is a DRAM cell</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C14/0018" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C14/0018</classification-symbol><class-title date-revised="2018-05-01"><title-part><CPC-specific-text><text>whereby the nonvolatile element is an EEPROM element, e.g. a floating gate or metal-nitride-oxide-silicon [MNOS] transistor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C14/0027" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C14/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and the nonvolatile element is a ferroelectric element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C14/0036" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C14/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and the nonvolatile element is a magnetic RAM [MRAM] element or ferromagnetic cell</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C14/0045" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11C14/0045</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>and the nonvolatile element is a resistive RAM element, i.e. programmable resistors, e.g. formed of phase change or chalcogenide material</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C14/0054" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C14/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the volatile element is a SRAM cell</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C14/0063" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C14/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and the nonvolatile element is an EEPROM element, e.g. a floating gate or MNOS transistor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C14/0072" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C14/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and the nonvolatile element is a ferroelectric element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C14/0081" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C14/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and the nonvolatile element is a magnetic RAM [MRAM] element or ferromagnetic cell</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C14/009" definition-exists="true" ipc-concordant="G11C14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11C14/009</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>and the nonvolatile element is a resistive RAM element, i.e. programmable resistors, e.g. formed of phase change or chalcogenide material</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C15/00" definition-exists="true" ipc-concordant="G11C15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C15/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Digital stores in which information comprising one or more characteristic parts is written into the store and in which information is read-out by searching for one or more of these characteristic parts, i.e. associative or content-addressed stores</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C15/02" definition-exists="false" ipc-concordant="G11C15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C15/04" definition-exists="false" ipc-concordant="G11C15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C15/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using semiconductor elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C15/043" definition-exists="false" ipc-concordant="G11C15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C15/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using capacitive charge storage elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C15/046" definition-exists="false" ipc-concordant="G11C15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C15/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using non-volatile storage elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C15/06" definition-exists="false" ipc-concordant="G11C15/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C15/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using cryogenic elements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C16/00" definition-exists="true" ipc-concordant="G11C16/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Erasable programmable read-only memories </text><reference><text><class-ref scheme="cpc">G11C14/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C16/02" definition-exists="true" ipc-concordant="G11C16/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C16/02</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>electrically programmable</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C16/04" definition-exists="false" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using variable threshold transistors, e.g. FAMOS</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/0408" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/0408</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising cells containing floating gate transistors </text><reference><text><class-ref scheme="cpc">G11C16/0483</class-ref>, <class-ref scheme="cpc">G11C16/0491</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/0416" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/0416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising cells containing a single floating gate transistor and no select transistor, e.g. UV EPROM</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/0425" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>G11C16/0425</classification-symbol><class-title date-revised="2015-10-01"><title-part><CPC-specific-text><text>comprising cells containing a merged floating gate and select transistor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/0433" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/0433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising cells containing a single floating gate transistor and one or more separate select transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/0441" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/0441</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising cells containing multiple floating gate devices, e.g. separate read-and-write FAMOS transistors with connected floating gates</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/045" definition-exists="false" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Floating gate memory cells with both P and N channel memory transistors, usually sharing a common floating gate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/0458" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C16/0458</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>comprising two or more independent floating gates which store independent data</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/0466" definition-exists="false" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C16/0466</classification-symbol><class-title date-revised="2018-05-01"><title-part><CPC-specific-text><text>comprising cells with charge storage in an insulating layer, e.g. metal-nitride-oxide-silicon [MNOS], silicon-oxide-nitride-oxide-silicon [SONOS] </text><reference><text><class-ref scheme="cpc">G11C16/0483</class-ref>, <class-ref scheme="cpc">G11C16/0491</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/0475" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C16/0475</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>comprising two or more independent storage sites which store independent data</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/0483" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/0483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising cells having several storage transistors connected in series</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/0491" definition-exists="true" ipc-concordant="G11C16/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/0491</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Virtual ground arrays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C16/06" definition-exists="true" ipc-concordant="G11C16/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C16/06</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Auxiliary circuits, e.g. for writing into memory</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/08" definition-exists="true" ipc-concordant="G11C16/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Address circuits</text></title-part><title-part><text>Decoders</text></title-part><title-part><text>Word-line control circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/10" definition-exists="true" ipc-concordant="G11C16/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Programming or data input circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/102" definition-exists="false" ipc-concordant="G11C16/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>External programming circuits, e.g. EPROM programmers; In-circuit programming or reprogramming; EPROM emulators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/105" definition-exists="false" ipc-concordant="G11C16/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods for updating contents of nonvolatile memory, especially with 'security' features to ensure reliable replacement, i.e. preventing that old data is lost before new data is reliably written</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/107" definition-exists="true" ipc-concordant="G11C16/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programming all cells in an array, sector or block to the same state prior to flash erasing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/12" definition-exists="true" ipc-concordant="G11C16/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Programming voltage switching circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/14" definition-exists="false" ipc-concordant="G11C16/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuits for erasing electrically, e.g. erase voltage switching circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/16" definition-exists="false" ipc-concordant="G11C16/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for erasing blocks, e.g. arrays, words, groups</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/18" definition-exists="true" ipc-concordant="G11C16/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuits for erasing optically</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/20" definition-exists="true" ipc-concordant="G11C16/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Initialising</text></title-part><title-part><text>Data preset</text></title-part><title-part><text>Chip identification</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/22" definition-exists="true" ipc-concordant="G11C16/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety or protection circuits preventing unauthorised or accidental access to memory cells</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/225" definition-exists="true" ipc-concordant="G11C16/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Preventing erasure, programming or reading when power supply voltages are outside the required ranges</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/24" definition-exists="true" ipc-concordant="G11C16/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bit-line control circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/26" definition-exists="true" ipc-concordant="G11C16/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sensing or reading circuits</text></title-part><title-part><text>Data output circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/28" definition-exists="false" ipc-concordant="G11C16/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using differential sensing or reference cells, e.g. dummy cells</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/30" definition-exists="true" ipc-concordant="G11C16/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Power supply circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/32" definition-exists="true" ipc-concordant="G11C16/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Timing circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C16/34" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/3404" definition-exists="true" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3404</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Convergence or correction of memory cell threshold voltages; Repair or recovery of overerased or overprogrammed cells</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/3409" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to recover overerased nonvolatile memory cells detected during erase verification, usually by means of a "soft" programming step</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/3413" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to recover overprogrammed nonvolatile memory cells detected during program verification, usually by means of a "soft" erasing step</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/3418" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disturbance prevention or evaluation; Refreshing of disturbed memory data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/3422" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to evaluate read or write disturbance in nonvolatile memory, without steps to mitigate the problem</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/3427" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to prevent or reduce disturbance of the state of a memory cell when neighbouring cells are read or written</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/3431" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3431</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to detect disturbed nonvolatile memory cells, e.g. which still read as programmed but with threshold less than the program verify threshold or read as erased but with threshold greater than the erase verify threshold, and to reverse the disturbance via a refreshing programming or erasing step</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/3436" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for verifying correct programming or erasure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/344" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/344</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for verifying correct erasure or for detecting overerased cells</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C16/3445" definition-exists="true" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to verify correct erasure of nonvolatile memory cells</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C16/345" definition-exists="true" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to detect overerased nonvolatile memory cells, usually during erasure verification</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/3454" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for verifying correct programming or for detecting overprogrammed cells</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C16/3459" definition-exists="true" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3459</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to verify correct programming of nonvolatile memory cells</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C16/3463" definition-exists="true" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to detect overprogrammed nonvolatile memory cells, usually during program verification</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/3468" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3468</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Prevention of overerasure or overprogramming, e.g. by verifying whilst erasing or writing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C16/3472" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to verify correct erasure of nonvolatile memory cells whilst erasing is in progress, e.g. by detecting onset or cessation of current flow in cells and using the detector output to terminate erasure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C16/3477" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to prevent overerasing of nonvolatile memory cells, e.g. by detecting onset or cessation of current flow in cells and using the detector output to terminate erasing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C16/3481" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to verify correct programming of nonvolatile memory cells whilst programming is in progress, e.g. by detecting onset or cessation of current flow in cells and using the detector output to terminate programming</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C16/3486" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to prevent overprogramming of nonvolatile memory cells, e.g. by detecting onset or cessation of current flow in cells and using the detector output to terminate programming</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C16/349" definition-exists="true" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/349</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for evaluating degradation, retention or wearout, e.g. by counting erase cycles</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C16/3495" definition-exists="false" ipc-concordant="G11C16/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C16/3495</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits or methods to detect or delay wearout of nonvolatile EPROM or EEPROM memory devices, e.g. by counting numbers of erase or reprogram cycles, by using multiple memory areas serially or cyclically</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C17/00" definition-exists="true" ipc-concordant="G11C17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C17/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Read-only memories programmable only once</text></title-part><title-part><text>Semi-permanent stores, e.g. manually-replaceable information cards</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C17/005" definition-exists="false" ipc-concordant="G11C17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a storage element common to a large number of data, e.g. perforated card </text><reference><text><class-ref scheme="cpc">G11C17/02</class-ref>, <class-ref scheme="cpc">G11C17/04</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C17/02" definition-exists="false" ipc-concordant="G11C17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C17/02</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>using magnetic or inductive elements </text><reference><text><class-ref scheme="cpc">G11C17/14</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C17/04" definition-exists="false" ipc-concordant="G11C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using capacitive elements </text><reference><text><class-ref scheme="cpc">G11C17/06</class-ref>, <class-ref scheme="cpc">G11C17/14</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C17/06" definition-exists="false" ipc-concordant="G11C17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using diode elements </text><reference><text><class-ref scheme="cpc">G11C17/14</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C17/08" definition-exists="false" ipc-concordant="G11C17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using semiconductor devices, e.g. bipolar elements </text><reference><text><class-ref scheme="cpc">G11C17/06</class-ref>, <class-ref scheme="cpc">G11C17/14</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C17/10" definition-exists="false" ipc-concordant="G11C17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C17/12" definition-exists="false" ipc-concordant="G11C17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using field-effect devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C17/123" definition-exists="true" ipc-concordant="G11C17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising cells having several storage transistors connected in series</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C17/126" definition-exists="true" ipc-concordant="G11C17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Virtual ground arrays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C17/14" definition-exists="true" ipc-concordant="G11C17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C17/143" definition-exists="false" ipc-concordant="G11C17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using laser-fusible links</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C17/146" definition-exists="false" ipc-concordant="G11C17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write once memory, i.e. allowing changing of memory content by writing additional bits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C17/16" definition-exists="true" ipc-concordant="G11C17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electrically-fusible links</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C17/165" definition-exists="false" ipc-concordant="G11C17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C17/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Memory cells which are electrically programmed to cause a change in resistance, e.g. to permit multiple resistance steps to be programmed rather than conduct to or from non-conduct change of fuses and antifuses </text><reference><text>digital stores using resistance random access memory elements <class-ref scheme="cpc">G11C13/0002</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C17/18" definition-exists="true" ipc-concordant="G11C17/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C17/18</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Auxiliary circuits, e.g. for writing into memory</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C19/00" definition-exists="true" ipc-concordant="G11C19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Digital stores in which the information is moved stepwise, e.g. shift registers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/005" definition-exists="false" ipc-concordant="G11C19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ferro-electric elements (condensers)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/02" definition-exists="false" ipc-concordant="G11C19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic elements </text><reference><text><class-ref scheme="cpc">G11C19/14</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/04" definition-exists="false" ipc-concordant="G11C19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using cores with one aperture or magnetic loop</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/06" definition-exists="false" ipc-concordant="G11C19/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using structures with a number of apertures or magnetic loops, e.g. transfluxors </text><CPC-specific-text><text>laddic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/08" definition-exists="true" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/08</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using thin films in plane structure</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C19/0808" definition-exists="false" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/0808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic domain propagation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C19/0816" definition-exists="false" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/0816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a rotating or alternating coplanar magnetic field</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C19/0825" definition-exists="false" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/0825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a variable perpendicular magnetic field</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C19/0833" definition-exists="false" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/0833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic domain interaction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C19/0841" definition-exists="false" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/0841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electric current</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C19/085" definition-exists="true" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/085</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Generating magnetic fields therefor, e.g. uniform magnetic field for magnetic domain stabilisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C19/0858" definition-exists="false" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/0858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Generating, replicating or annihilating magnetic domains (also comprising different types of magnetic domains, e.g. "Hard Bubbles") </text><reference><text><class-ref scheme="cpc">G11C19/0866</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C19/0866" definition-exists="true" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/0866</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Detecting magnetic domains</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C19/0875" definition-exists="true" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/0875</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Organisation of a plurality of magnetic shift registers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C19/0883" definition-exists="true" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/0883</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Means for switching magnetic domains from one path into another path, i.e. transfer switches, swap gates or decoders</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C19/0891" definition-exists="false" ipc-concordant="G11C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/0891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using hybrid structure, e.g. ion doped layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/10" definition-exists="false" ipc-concordant="G11C19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thin films on rods</text></title-part><title-part><text>with twistors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/12" definition-exists="false" ipc-concordant="G11C19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11C19/12</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>using non-linear reactive devices in resonant circuits </text><CPC-specific-text><text>, e.g. parametrons; magnetic amplifiers with overcritical feedback</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/14" definition-exists="false" ipc-concordant="G11C19/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11C19/14</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>using magnetic elements in combination with active elements, e.g. discharge tubes, semiconductor elements </text><CPC-specific-text><reference><text>contains no documents, <u>see</u> provisionally <class-ref scheme="cpc">G11C19/02</class-ref> - <class-ref scheme="cpc">G11C19/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/18" definition-exists="false" ipc-concordant="G11C19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using capacitors as main elements of the stages </text><CPC-specific-text><reference><text>if capacitors are used as auxiliary stage in between main stages with other elements, the latter take precedence; <class-ref scheme="cpc">G11C19/005</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/182" definition-exists="false" ipc-concordant="G11C19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with semiconductor elements, e.g. bipolar transistors, diodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C19/184" definition-exists="false" ipc-concordant="G11C19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with field-effect transistors, e.g. MOS-FET</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C19/186" definition-exists="false" ipc-concordant="G11C19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using only one transistor per capacitor, e.g. bucket brigade shift register</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C19/188" definition-exists="true" ipc-concordant="G11C19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/188</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Organisation of a multiplicity of shift registers, e.g. regeneration, timing or input-output circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/20" definition-exists="false" ipc-concordant="G11C19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using discharge tubes </text><reference><text><class-ref scheme="cpc">G11C19/14</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/202" definition-exists="false" ipc-concordant="G11C19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with vacuum tubes </text><reference><text><class-ref scheme="cpc">G11C19/207</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/205" definition-exists="false" ipc-concordant="G11C19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with gas-filled tubes </text><reference><text><class-ref scheme="cpc">G11C19/207</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/207" definition-exists="false" ipc-concordant="G11C19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with counting tubes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/28" definition-exists="false" ipc-concordant="G11C19/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/28</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using semiconductor elements </text><reference><text><class-ref scheme="cpc">G11C19/14</class-ref>, <class-ref scheme="cpc">G11C19/36</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/282" definition-exists="false" ipc-concordant="G11C19/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C19/282</classification-symbol><class-title date-revised="2018-05-01"><title-part><CPC-specific-text><text>with charge storage in a depletion layer, i.e. charge coupled devices [CCD]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C19/285" definition-exists="false" ipc-concordant="G11C19/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Peripheral circuits, e.g. for writing into the first stage; for reading-out of the last stage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/287" definition-exists="true" ipc-concordant="G11C19/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/287</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>Organisation of a multiplicity of shift registers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/30" definition-exists="false" ipc-concordant="G11C19/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/30</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/32" definition-exists="false" ipc-concordant="G11C19/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/32</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using super-conductive elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/34" definition-exists="true" ipc-concordant="G11C19/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C19/34</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C19/36" definition-exists="false" ipc-concordant="G11C19/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using </text><CPC-specific-text><text>multistable</text></CPC-specific-text><text> semiconductor elements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C19/38" definition-exists="false" ipc-concordant="G11C19/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C19/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>two-dimensional, e.g. horizontal and vertical shift registers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C21/00" definition-exists="true" ipc-concordant="G11C21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C21/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Digital stores in which the information circulates </text><CPC-specific-text><text>continuously</text></CPC-specific-text><reference><text>stepwise <class-ref scheme="cpc">G11C19/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C21/005" definition-exists="true" ipc-concordant="G11C21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C21/005</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>using electrical delay lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C21/02" definition-exists="true" ipc-concordant="G11C21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C21/02</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using electromechanical delay lines, e.g. using a mercury tank</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C21/023" definition-exists="false" ipc-concordant="G11C21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C21/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using piezo-electric transducers, e.g. mercury tank</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C21/026" definition-exists="false" ipc-concordant="G11C21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C21/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetostriction transducers, e.g. nickel delay line</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C23/00" definition-exists="true" ipc-concordant="G11C23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C23/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Digital stores characterised by movement of mechanical parts to effect storage, e.g. using balls</text></title-part><title-part><text>Storage elements therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C25/00" definition-exists="true" ipc-concordant="G11C25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C25/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Digital stores characterised by the use of flowing media</text></title-part><title-part><text>Storage elements therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C27/00" definition-exists="true" ipc-concordant="G11C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C27/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Electric analogue stores, e.g. for storing instantaneous values</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C27/005" definition-exists="false" ipc-concordant="G11C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C27/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with non-volatile charge storage, e.g. on floating gate or MNOS</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C27/02" definition-exists="true" ipc-concordant="G11C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C27/02</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Sample-and-hold arrangements </text><reference><text><class-ref scheme="cpc">G11C27/04</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C27/022" definition-exists="false" ipc-concordant="G11C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C27/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a magnetic memory element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C27/024" definition-exists="false" ipc-concordant="G11C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C27/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a capacitive memory element </text><reference><text><class-ref scheme="cpc">G11C27/04</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C27/026" definition-exists="false" ipc-concordant="G11C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C27/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>associated with an amplifier </text><reference><text><class-ref scheme="cpc">G11C27/028</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C27/028" definition-exists="false" ipc-concordant="G11C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C27/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current mode circuits, e.g. switched current memories</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C27/04" definition-exists="true" ipc-concordant="G11C27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C27/04</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Shift registers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C29/00" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C29/00</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Checking stores for correct operation </text><CPC-specific-text><text>; Subsequent repair</text></CPC-specific-text></title-part><title-part><text>Testing stores during standby or offline operation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C29/003" definition-exists="false" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in serial memories</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C29/006" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C29/006</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>at wafer scale level, i.e. wafer scale integration [WSI]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C29/02" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detection or location of defective auxiliary circuits, e.g. defective refresh counters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/021" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in voltage or current generators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/022" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in I/O circuitry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/023" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in clock generator or timing circuitry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/024" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in decoders</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/025" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in signal lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/026" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in sense amplifiers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/027" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in fuses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/028" definition-exists="false" ipc-concordant="G11C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with adaption or trimming of parameters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C29/04" definition-exists="false" ipc-concordant="G11C29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11C29/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Detection or location of defective memory elements </text><CPC-specific-text><text>, e.g. cell constructio details, timing of test signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C29/0401" definition-exists="false" ipc-concordant="G11C29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/0401</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in embedded memories</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C29/0403" definition-exists="false" ipc-concordant="G11C29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/0403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>during or with feedback to manufacture</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C29/0405" definition-exists="false" ipc-concordant="G11C29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/0405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising complete test loop</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C29/0407" definition-exists="false" ipc-concordant="G11C29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/0407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on power on</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C29/0409" definition-exists="false" ipc-concordant="G11C29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/0409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Online test</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C29/0411" definition-exists="false" ipc-concordant="G11C29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/0411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Online error correction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/06" definition-exists="false" ipc-concordant="G11C29/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Acceleration testing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/08" definition-exists="false" ipc-concordant="G11C29/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Functional testing, e.g. testing during refresh, power-on self testing [POST] or distributed testing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/10" definition-exists="false" ipc-concordant="G11C29/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G11C29/10</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Test algorithms, e.g. memory scan [MScan] algorithms</text></title-part><title-part><text>Test patterns, e.g. checkerboard patterns </text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/12" definition-exists="false" ipc-concordant="G11C29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Built-in arrangements for testing, e.g. built-in self testing [BIST] </text><CPC-specific-text><text>or interconnection details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/12005" definition-exists="false" ipc-concordant="G11C29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/12005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising voltage or current generators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/1201" definition-exists="false" ipc-concordant="G11C29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/1201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising I/O circuitry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/12015" definition-exists="false" ipc-concordant="G11C29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/12015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising clock generation or timing circuitry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C29/1202" definition-exists="false" ipc-concordant="G11C29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/1202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Word line control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C29/1204" definition-exists="false" ipc-concordant="G11C29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/1204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bit line control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C29/1206" definition-exists="false" ipc-concordant="G11C29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/1206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Location of test circuitry on chip or wafer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C29/1208" definition-exists="false" ipc-concordant="G11C29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/1208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error catch memory</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/14" definition-exists="false" ipc-concordant="G11C29/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Implementation of control logic, e.g. test mode decoders</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/16" definition-exists="false" ipc-concordant="G11C29/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using microprogrammed units, e.g. state machines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/18" definition-exists="false" ipc-concordant="G11C29/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Address generation devices</text></title-part><title-part><text>Devices for accessing memories, e.g. details of addressing circuits</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11C29/1802" definition-exists="false" ipc-concordant="G11C29/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/1802</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address decoder</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11C29/1804" definition-exists="false" ipc-concordant="G11C29/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/1804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manipulation of word size</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11C29/1806" definition-exists="false" ipc-concordant="G11C29/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/1806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address conversion or mapping, i.e. logical to physical address</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/20" definition-exists="false" ipc-concordant="G11C29/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using counters or linear-feedback shift registers [LFSR]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/22" definition-exists="false" ipc-concordant="G11C29/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Accessing serial memories</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/24" definition-exists="false" ipc-concordant="G11C29/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Accessing extra cells, e.g. dummy cells or redundant cells</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/26" definition-exists="false" ipc-concordant="G11C29/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Accessing multiple arrays </text><reference><text><class-ref scheme="cpc">G11C29/24</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11C29/2602" definition-exists="false" ipc-concordant="G11C29/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/2602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Concurrent test</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C29/28" definition-exists="false" ipc-concordant="G11C29/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dependent multiple arrays, e.g. multi-bit arrays</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/30" definition-exists="false" ipc-concordant="G11C29/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Accessing single arrays</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C29/32" definition-exists="false" ipc-concordant="G11C29/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Serial access</text></title-part><title-part><text>Scan testing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11C29/3202" definition-exists="false" ipc-concordant="G11C29/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/3202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scan chain</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11C29/34" definition-exists="false" ipc-concordant="G11C29/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Accessing multiple bits simultaneously</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/36" definition-exists="false" ipc-concordant="G11C29/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Data generation devices, e.g. data inverters</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11C29/3602" definition-exists="false" ipc-concordant="G11C29/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/3602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pattern generator</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/38" definition-exists="false" ipc-concordant="G11C29/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Response verification devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/40" definition-exists="false" ipc-concordant="G11C29/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using compression techniques</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11C29/4002" definition-exists="false" ipc-concordant="G11C29/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/4002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comparison of products, i.e. test results of chips or with golden chip</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/42" definition-exists="false" ipc-concordant="G11C29/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using error correcting codes [ECC] or parity check</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/44" definition-exists="false" ipc-concordant="G11C29/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indication or identification of errors, e.g. for repair</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/4401" definition-exists="false" ipc-concordant="G11C29/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/4401</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for self repair</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11C29/4402" definition-exists="false" ipc-concordant="G11C29/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/4402</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Internal storage of test result, quality data, chip identification, repair information</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/46" definition-exists="false" ipc-concordant="G11C29/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Test trigger logic</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/48" definition-exists="true" ipc-concordant="G11C29/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C29/48</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>Arrangements in static stores specially adapted for testing by means external to the store, e.g. using direct memory access [DMA] or using auxiliary access paths</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/50" definition-exists="false" ipc-concordant="G11C29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Marginal testing, e.g. race, voltage or current testing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/50004" definition-exists="false" ipc-concordant="G11C29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/50004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of threshold voltage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/50008" definition-exists="false" ipc-concordant="G11C29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/50008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of impedance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/50012" definition-exists="false" ipc-concordant="G11C29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/50012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of timing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/50016" definition-exists="false" ipc-concordant="G11C29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/50016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of retention</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C29/5002" definition-exists="false" ipc-concordant="G11C29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/5002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characteristic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C29/5004" definition-exists="false" ipc-concordant="G11C29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/5004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Voltage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C29/5006" definition-exists="false" ipc-concordant="G11C29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/5006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11C29/52" definition-exists="false" ipc-concordant="G11C29/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Protection of memory contents</text></title-part><title-part><text>Detection of errors in memory contents</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/56004" definition-exists="false" ipc-concordant="G11C29/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/56004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pattern generation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/56008" definition-exists="false" ipc-concordant="G11C29/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/56008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error analysis, representation of errors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/56016" definition-exists="false" ipc-concordant="G11C29/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/56016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Apparatus features</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C29/5602" definition-exists="false" ipc-concordant="G11C29/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/5602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interface to device under test</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C29/5606" definition-exists="false" ipc-concordant="G11C29/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2029/5606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error catch memory</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/702" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/702</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by replacing auxiliary circuits, e.g. spare voltage generators, decoders or sense amplifiers, to be used instead of defective ones</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/74" definition-exists="false" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using duplex memories, i.e. using dual copies</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/76" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using address translation or modifications</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/765" definition-exists="false" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/765</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in solid state disks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/78" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using programmable devices</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/781" definition-exists="false" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/781</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combined in a redundant decoder</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/783" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/783</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with refresh of replacement cells, e.g. in DRAMs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/785" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/785</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with redundancy programming schemes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/789" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11C29/789</classification-symbol><class-title date-revised="2021-02-01"><title-part><CPC-specific-text><text>using non-volatile cells or latches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/80" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with improved layout</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/802" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/802</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by encoding redundancy signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/804" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to prevent clustered faults</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/806" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by reducing size of decoders</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/808" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a flexible replacement scheme</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/81" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/81</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a hierarchical redundancy scheme</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/812" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/812</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a reduced amount of fuses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/814" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/814</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for optimized yield</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/816" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for an application-specific layout</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/818" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for dual-port memories</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/82" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for EEPROMs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/822" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for read only memories</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11C29/824" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/824</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for synchronous memories</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/83" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/83</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with reduced power consumption</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/832" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/832</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with disconnection of faulty elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/835" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with roll call arrangements for redundant substitutions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/838" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/838</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with substitution of defective spares</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/84" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with improved access time or stability</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/842" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/842</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by introducing a delay in a signal path</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/844" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/844</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by splitting the decoders in stages</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/846" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/846</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by choosing redundant lines at an output stage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11C29/848" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/848</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adjacent switching</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/86" definition-exists="false" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in serial access memories, e.g. shift registers, CCDs, bubble memories</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11C29/88" definition-exists="true" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C29/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with partially good memories</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/883" definition-exists="false" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11C29/883</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>using a single defective memory device with reduced capacity, e.g. half capacity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11C29/886" definition-exists="false" ipc-concordant="G11C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11C29/886</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>combining plural defective memory devices to provide a contiguous address range, e.g. one device supplies working blocks to replace defective blocks in another device</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11C99/00" definition-exists="false" ipc-concordant="G11C99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C99/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Subject matter not provided for in other groups of this subclass</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="G11C207/00" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G11C207/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to arrangements for writing information into, or reading information out from, a digital store</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C207/002" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Isolation gates, i.e. gates coupling bit lines to the sense amplifier</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C207/005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11C2207/005</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Transfer gates, i.e. gates coupling the sense amplifier output to data lines, I/O lines or global bit lines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C207/007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Register arrays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C207/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sense amplifier related aspects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/061" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sense amplifier enabled by a address transition detection related control signal</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/063" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Current sense amplifiers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/065" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sense amplifier drivers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency reading type sense amplifier</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/068" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integrator type sense amplifier</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C207/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aspects relating to interfaces of memory device to external buses</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/101" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Analog or multilevel bus</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/102" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compression or decompression of data before storage</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/104" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Embedded memory devices, e.g. memories with a processing device on the same die or ASIC memory designs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/105" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aspects related to pads, pins or terminals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/107" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Serial-parallel conversion of data or prefetch</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/108" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wide data ports</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C207/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Equalization of bit lines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C207/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Solid state audio </text><reference><text>deprecated, only for historical reasons, <class-ref scheme="cpc">G06F3/16</class-ref>, <class-ref scheme="cpc">G11B</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C207/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control and timing of internal memory operations</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2209" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2209</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Concurrent read and write </text><reference><text>for multi-port memory <class-ref scheme="cpc">G11C7/1075</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2218" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2218</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Late write</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2227" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2227</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Standby or low power modes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2236" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2236</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Copy</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2245" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2245</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory devices with an internal cache buffer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2254" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2254</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Calibration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2263" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2263</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Write conditionally, e.g. only if new data and old data differ</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2272" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2272</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Latency related aspects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/2281" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/2281</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Timing of a read operation </text><reference><text>sense amplifier timing <class-ref scheme="cpc">G11C7/06</class-ref>, <class-ref scheme="cpc">G11C7/08</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C207/229" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2207/229</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Timing of a write operation </text><reference><text>sense amplifier timing <class-ref scheme="cpc">G11C7/06</class-ref>, <class-ref scheme="cpc">G11C7/08</class-ref></text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G11C211/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to digital stores characterized by the use of particular electric or magnetic storage elements</text></title-part><title-part><text>Storage elements therefor</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C211/401" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/401</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to cells needing refreshing or charge regeneration, i.e. dynamic cells</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C211/4013" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/4013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory devices with multiple cells per bit, e.g. twin-cells</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C211/4016" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/4016</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory devices with silicon-on-insulator cells</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C211/406" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/406</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Refreshing of dynamic cells</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/4061" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/4061</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Calibration or ate or cycle tuning</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/4062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/4062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Parity or ECC in refresh operations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/4063" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/4063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interleaved refresh operations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/4065" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/4065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Low level details of refresh operations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/4066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/4066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pseudo-SRAMs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/4067" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11C2211/4067</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Refresh in standby or low power modes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/4068" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/4068</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Voltage or leakage in refresh operations</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C211/56" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to <class-ref scheme="cpc">G11C11/56</class-ref> and sub-groups for features not covered by these groups</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C211/561" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/561</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory cell aspects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5611" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5611</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory cell with more than one control gate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5612" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5612</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory cell with more than one floating gate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5613" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5613</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory cell with additional gates, not being floating or control gates</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5614" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5614</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory cell comprising negative resistance, quantum tunneling or resonance tunneling elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5615" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5615</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel magnetic memory cell using non-magnetic non-conducting interlayer, e.g. MTJ</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5616" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5616</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel magnetic memory cell using non-magnetic conducting interlayer, e.g. GMR, SV, PSV</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5617" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5617</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel ROM cell programmed by source, drain or gate contacting</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C211/562" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/562</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory programming aspects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5621" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5621</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel programming verification</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5622" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5622</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Concurrent multilevel programming of more than one cell</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5623" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5623</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Concurrent multilevel programming and reading</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5624" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5624</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Concurrent multilevel programming and programming verification</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5625" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5625</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Self-converging multilevel programming</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C211/563" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/563</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory reading aspects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5631" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5631</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Concurrent multilevel reading of more than one cell</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5632" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5632</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel reading using successive approximation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5633" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5633</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mixed concurrent serial multilevel reading</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5634" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5634</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reference cells</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C211/564" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/564</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Miscellaneous aspects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5641" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5641</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory having cells with different number of storage levels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5642" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5642</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory with buffers, latches, registers at input or output</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5643" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5643</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory comprising cache storage devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5644" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5644</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory comprising counting devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5645" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5645</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory with current-mirror arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5646" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5646</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory with flag bits, e.g. for showing that a "first page" of a word line is programmed but not a "second page"</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5647" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5647</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory with bit inversion arrangement</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5648" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5648</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory programming, reading or erasing operations wherein the order or sequence of the operations is relevant</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/5649" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/5649</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory with plate line or layer, e.g. in order to lower programming voltages</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11C211/565" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2211/565</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilevel memory comprising elements in triple well structure</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G11C213/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to <class-ref scheme="cpc">G11C13/00</class-ref> for features not covered by this group</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C213/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resistive cells</text></title-part><title-part><text>Technology aspects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/11" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metal ion trapping, i.e. using memory material including cavities, pores or spaces in form of tunnels or channels wherein metal ions can be trapped but do not react and form an electro-deposit creating filaments or dendrites</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-metal ion trapping, i.e. using memory material trapping non-metal ions given by the electrode or another layer during a write operation, e.g. trapping, doping</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/13" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dissociation, i.e. using memory material including molecules which, during a write operation, are dissociated in ions which migrate further in the memory material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Use of different molecule structures as storage states, e.g. part of molecule being rotated</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/15" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Current-voltage curve</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory cell being a nanotube, e.g. suspended nanotube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/17" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory cell being a nanowire transistor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory cell being a nanowire having RADIAL composition</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/19" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory cell comprising at least a nanowire and only two terminals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C213/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resistive cell, memory material aspects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/31" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/31</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Material having complex metal oxide, e.g. perovskite structure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Material having simple binary metal oxide structure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/33" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/33</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Material including silicon</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Material includes an oxide or a nitride</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/35" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11C2213/35</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Material including carbon, e.g. graphite, grapheme</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11C213/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resistive cell structure aspects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/51" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/51</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure including a barrier layer preventing or limiting migration, diffusion of ions or charges or formation of electrolytes near an electrode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure characterized by the electrode material, shape, etc.</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/53" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/53</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure wherein the resistive material being in a transistor, e.g. gate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/54" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure including a tunneling barrier layer, the memory effect implying the modification of tunnel barrier conductivity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11C213/55" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11C2213/55</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure including two electrodes, a memory active layer and at least two other layers which can be a passive or source or reservoir layer or a less doped memory active layer</text></title-part></class-title></classification-item>
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