Static information storage and retrieval – Floating gate – Particular biasing
Reexamination Certificate
2004-12-22
2008-12-16
Nguyen, Dang T (Department: 2824)
Static information storage and retrieval
Floating gate
Particular biasing
C365S185170, C365S202000
Reexamination Certificate
active
07466597
ABSTRACT:
A NAND flash memory device according to some embodiments includes a cell array, a page buffer configured to copyback read the data in the cell array, and an error detector for detecting errors that occur during the copyback reading and for generating a detection signal. Detecting errors is performed concurrently with a copyback program operation and completes before finishing a copyback program verify operation. The data stored in the page buffer may be copyback programmed when the detection signal is a pass signal. The copyback operation may end without executing the copyback program operation when the detection signal is a fail signal. Since the copyback program operation and the error detection operation are performed concurrently, the errors occurring during the copyback operation may be detected without additional time delay. Additionally, occurrence of two-bit error may be prevented because the copyback program is not executed when the fail signal is generated.
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Marger & Johnson & McCollom, P.C.
Nguyen Dang T
Samsung Electronics Co,. Ltd.
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