发明授权
EP1864293B1 ERASING NON-VOLATILE MEMORY USING INDIVIDUAL VERIFICATION AND ADDITIONAL ERASING OF SUBSETS OF MEMORY CELLS
有权
不要删除易失性存储器使用单独的验证和记忆细胞亚群的附加擦除
- 专利标题： ERASING NON-VOLATILE MEMORY USING INDIVIDUAL VERIFICATION AND ADDITIONAL ERASING OF SUBSETS OF MEMORY CELLS
- 专利标题（中）： 不要删除易失性存储器使用单独的验证和记忆细胞亚群的附加擦除
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申请号： EP06739859.4申请日： 2006-03-29
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公开(公告)号： EP1864293B1公开(公告)日： 2010-08-04
- 发明人: HEMINK, Gerrit, Jan , KAMEI, Teruhiko
- 申请人： SanDisk Corporation
- 申请人地址： 140 Caspian Court Sunnyvale, CA 94089 US
- 专利权人： SanDisk Corporation
- 当前专利权人： SanDisk Corporation
- 当前专利权人地址： 140 Caspian Court Sunnyvale, CA 94089 US
- 代理机构： Tothill, John Paul
- 优先权： US667043P 20050331; US296055 20051206; US296028 20051206
- 国际公布： WO2006105120 20061005
- 主分类号： G11C16/34
- IPC分类号： G11C16/34
摘要：
A set of non-volatile storage elements is divided into subsets for erasing in order to avoid over-erasing faster erasing storage elements. The entire set of elements is erased until a first subset of the set of elements is verified as erased. The first subset can include the faster erasing cells. Verifying the first subset includes excluding a second subset from verification. After the first subset is verified as erased, they are inhibited from erasing while the second subset is further erased. The set of elements is verified as erased when the second subset is verified as erased. Verifying that the set of elements is erased can include excluding the first subset from verification or verifying both the first and second subsets together. Different step sizes are used, depending on which subset is being erased and verified in order to more efficiently and accurately erase the set of elements.
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