05535328 is referenced by 202 patents and cites 57 patents.

A system of Flash EEprom memory chips with controlling circuits serves as non-volatile memory such as that provided by magnetic disk drives. Improvements include selective multiple sector erase, in which any combinations of Flash sectors may be erased together. Selective sectors among the selected combination may also be de-selected during the erase operation. Another improvement is the ability to remap and replace defective cells with substitute cells. The remapping is performed automatically as soon as a defective cell is detected. When the number of defects in a Flash sector becomes large, the whole sector is remapped. Yet another improvement is the use of a write cache to reduce the number of writes to the Flash EEprom memory, thereby minimizing the stress to the device from undergoing too many write/erase cycling.

Title
Non-volatile memory system card with flash erasable sectors of EEprom cells including a mechanism for substituting defective cells
Application Number
337566
Publication Number
5535328
Application Date
February 23, 1995
Publication Date
July 9, 1996
Inventor
Sanjay Mehrotra
Milpitas
CA, US
Robert D Norman
San Jose
CA, US
Eliyahou Harari
Los Gatos
CA, US
Agent
Majestic Parsons Siebert & Hsue
Assignee
SanDisk Corporation
CA, US
IPC
G06F 11/16
G06F 12/00
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