发明公开
- 专利标题： SOFT PROGRAMMING NON-VOLATILE MEMORY UTILIZING INDIVIDUAL VERIFICATION AND ADDITIONAL SOFT PROGRAMMING OF SUBSETS OF MEMORY CELLS
- 专利标题（中）： 软编程不挥发存储器使用个别认证和附加软编程存储器单元组
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申请号： EP06739867.7申请日： 2006-03-29
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公开(公告)号： EP1864294A1公开(公告)日： 2007-12-12
- 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; US295747 20051206; US296071 20051206
- 国际公布： WO2006105133 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 soft programming in order to more fully soft-program slower soft programming elements. The entire set of elements is soft-programmed until verified as soft programmed (or until a first subset of elements is verified as soft programmed while excluding a second subset from verification). After the set is verified as soft programmed, a first subset of elements is inhibited from further soft programming while additional soft programming is carried out on a second subset of elements. The second subset can include slower soft programming elements. The second subset can then undergo soft programming verification while excluding the first subset from verification. Soft programming and verifying for the second subset can continue until it is verified as soft programmed. Different step sizes can be used for increasing the size of the soft programming signal, depending on which subset is being soft programmed and verified.
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