Static information storage and retrieval – Read/write circuit – Data refresh
Reexamination Certificate
2008-12-18
2010-12-28
Dinh, Son (Department: 2824)
Static information storage and retrieval
Read/write circuit
Data refresh
C365S189140, C365S230030, C365S210130
Reexamination Certificate
active
07859932
ABSTRACT:
Techniques are disclosed to refresh data in a non-volatile storage device often enough to combat erroneous or corrupted data bits, but not so often as to interfere with memory access or to cause excessive stress on the memory cells. One embodiment includes determining to perform a refresh of data stored in a first group of non-volatile storage elements in a device based on a condition of data in the first group, determining that a second group of non-volatile storage elements in the device should undergo a refresh procedure based on when the second group of non-volatile storage elements were last programmed relative to when the first group of non-volatile storage elements were last programmed, and performing the refresh procedure on the second group of non-volatile storage element.
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Dinh Son
SanDisk Corporation
Vierra Magen Marcus & DeNiro LLP
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