Nonvolatile semiconductor memory device having variable writing

Details Nonvolatile semiconductor memory device having variable writing Nonvolatile semiconductor memory device having variable writing

1996-09-24

1998-01-13

Nelms, David C.

Static information storage and retrieval

Floating gate

Particular biasing

36518522, 36518518, G11C 1134

Patent

active

057086052

ABSTRACT:
In a nonvolatile semiconductor memory device, a nonvolatile counter is provided to store a number of erasing operations. A time period of a writing operation upon a memory cell is changed in accordance with the number of erasing operations. Also, a time period of an erasing operation upon memory cells is changed in accordance with the number of erasing operations.

REFERENCES:
patent: 5410511 (1995-04-01), Michiyama
patent: 5463586 (1995-10-01), Chao et al.
patent: 5583809 (1996-12-01), Noguchi et al.
patent: 5621687 (1997-04-01), Doller

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