Apparatus for reducing the impact of program disturb
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United States of America Patent
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Sep 14, 2010
Grant Date -
Jul 9, 2009
app pub date -
Feb 4, 2009
filing date -
Apr 12, 2006
priority date (Note) -
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Abstract
The unintentional programming of an unselected (or inhibited) non-volatile storage element during a program operation that intends to program another non-volatile storage element is referred to as “program disturb.” A system is proposed for programming and/or reading non-volatile storage that reduces the effect of program disturb. In one embodiment, different verify levels are used for a particular word line (or other grouping of storage elements) during a programming process. In another embodiment, different compare levels are used for a particular word (or other grouping of storage elements) during a read process.
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