Static information storage and retrieval – Floating gate – Particular connection
Reexamination Certificate
2007-02-06
2007-02-06
Elms, Richard (Department: 2824)
Static information storage and retrieval
Floating gate
Particular connection
C365S185110, C365S185200, C365S185290, C365S200000
Reexamination Certificate
active
11253531
ABSTRACT:
In order to maintain the integrity of data stored in a flash memory that are susceptible to being disturbed by operations in adjacent regions of the memory, disturb events cause the data to be read, corrected and re-written before becoming so corrupted that valid data cannot be recovered. The sometimes conflicting needs to maintain data integrity and system performance are balanced by deferring execution of some of the corrective action when the memory system has other high priority operations to perform. In a memory system utilizing very large units of erase, the corrective process is executed in a manner that is consistent with efficiently rewriting an amount of data much less than the capacity of a unit of erase. Data is rewritten when severe errors are found during read operations. Portions of data are corrected and copied within the time limit for read operation. Corrected portions are written to dedicated blocks.
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Conley Kevin M.
Elhamias Reuven
Gonzalez Carlos J.
Gorobets Sergey Anatolievich
Elms Richard
Luu Pho M.
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