0392895-A2 is referenced by 286 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
Flash eeprom system.
Application Number
EP19900400885 19900330
Publication Number
0392895 (A2)
Application Date
March 30, 1990
Publication Date
October 17, 1990
Inventor
Mehrotra Sanjay
US
Norman Robert D
US
Harari Eliyahou
US
Assignee
Sundisk
US
IPC
G06F 11/20
H01L 29/66
H01L 21/70
H01L 29/792
H01L 29/788
H01L 27/115
H01L 21/8247
H01L 21/82
G11C 29/26
G11C 29/04
G11C 29/00
G11C 17/00
G11C 16/34
G11C 16/16
G11C 16/06
G11C 11/56
G11C 05/00
G06F 12/16
G06F 12/08
G06F 12/02
G06F 12/00
G06F 03/06
G11C 16/02
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