Semiconductor nonvolatile storage device

Static information storage and retrieval – Floating gate – Particular biasing

Reexamination Certificate

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C365S185220, C365S185290

Reexamination Certificate

active

06999349

ABSTRACT:
A writing operation selecting circuit is provided for selecting a temporary writing operation having a prescribed writing time for a memory cell transistor element and an additional writing operation for the memory cell transistor element. A writing time control circuit is provided for controlling an additional writing operation time by an output signal of the writing operation selecting circuit.

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patent: 5933366 (1999-08-01), Yoshikawa
patent: 6157573 (2000-12-01), Ishii et al.
patent: 6243292 (2001-06-01), Kobayashi et al.
patent: 6259624 (2001-07-01), Nobukata
patent: 6456532 (2002-09-01), Ohmi et al.
patent: 4-291644 (1992-10-01), None
patent: 4-337666 (1992-11-01), None
patent: WO 01/84552 (2001-11-01), None

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