Static information storage and retrieval – Floating gate – Particular biasing
Reexamination Certificate
2006-06-06
2006-06-06
Hoang, Huan (Department: 2827)
Static information storage and retrieval
Floating gate
Particular biasing
C365S185180, C365S185030
Reexamination Certificate
active
07057939
ABSTRACT:
In a non-volatile memory programming scheme where the memory cells are programmed in two or more sequential programming passes, when there is insufficient host data to program at least some of the memory cells during the second pass, some of the memory cells may be programmed to the wrong threshold voltage. This can be prevented by modifying the programming scheme so that this does not occur. In one implementation, this is accomplished by choosing a code scheme, which does not cause the memory cells to be programmed to the wrong threshold voltage during the second programming pass, or by programming the memory cells in accordance with substitute data that would not cause the cells to be programmed to an erroneous state.
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Fong Yupin Kawing
Li Yan
Miwa Toru
Hoang Huan
Parsons Hsue & De Runtz LLP
SanDisk Corporation
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