Non-volatile semiconductor memory device having a memory cell ca

Details Non-volatile semiconductor memory device having a memory cell ca Non-volatile semiconductor memory device having a memory cell ca

1997-09-30

1999-10-19

Nelms, David

Static information storage and retrieval

Addressing

36518503, 365185118, G11C 800

Patent

active

059700122

ABSTRACT:
The non-volatile semiconductor memory of the present invention comprises a memory cell transistor to which three or more threshold values are set by controlling the floating gate-source voltage, wherein the voltage of the floating gate is maintained constant while the voltage applied to the source is varied.

REFERENCES:
patent: 5262984 (1993-11-01), Noguchi et al.
patent: 5511021 (1996-04-01), Bergemont et al.
patent: 5550772 (1996-08-01), Gill
patent: 5638323 (1997-06-01), Itano
patent: 5642312 (1997-06-01), Harai
patent: 5708600 (1998-01-01), Hakozaki et al.
patent: 5721701 (1998-02-01), Ikebe et al.

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