Nonvolatile semiconductor memory

Details Nonvolatile semiconductor memory Nonvolatile semiconductor memory

2004-07-26

2009-02-17

Lam, David (Department: 2827)

Static information storage and retrieval

Floating gate

Particular biasing

C365S185220, C365S185180, C365S185240, C365S185170

Reexamination Certificate

active

07492643

ABSTRACT:
A nonvolatile semiconductor memory according to an example of the present invention comprises a memory cell array composed of a plurality of memory cells, an internal circuit which writes into the plurality of memory cells by use of one of a first mode in which a first threshold distribution can be obtained and a second mode in which a second threshold distribution different from the first threshold distribution can be obtained, and a threshold distribution control circuit which controls switchover between the first mode and the second mode.

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