发明名称 |
Non-volatile semiconductor memory |
摘要 |
A non-volatile semiconductor memory is disclosed, which comprises a plurality of memory cell arrays each having a number-of-rewrites storage region allocated to a portion of a corresponding cell array, and a number-of-rewrites write control circuit which stores the number of rewrites in cell transistors of the number-of-rewrites storage regions in non-selected memory cell arrays of the plurality of memory cell arrays by executing write of data to the cell transistors at a voltage lower than an ordinary write voltage so as to change a threshold value of the cell transistors in analog fashion according to an amount of electrons injected into floating gates of the cell transistors.
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申请公布号 |
US7636255(B2) |
申请公布日期 |
2009.12.22 |
申请号 |
US20070854048 |
申请日期 |
2007.09.12 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
SUGIURA YOSHIHISA;SUZUKI TAKASHI |
分类号 |
G11C16/00;G11C16/02;G11C16/04;G11C16/06;G11C16/34;G11C27/00 |
主分类号 |
G11C16/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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