Nonvolatile semiconductor memory device capable of uniformly...

Details Nonvolatile semiconductor memory device capable of uniformly... Nonvolatile semiconductor memory device capable of uniformly...

2005-02-15

2005-02-15

Nguyen, Viet Q. (Department: 2818)

Static information storage and retrieval

Floating gate

Particular biasing

C365S185220, C365S185240, C365S185030, C365S205000, C365S189011

Reexamination Certificate

active

06856550

ABSTRACT:
At the time of an operation of writing data to a specific memory cell in a memory block, a semiconductor memory device applies a write voltage for a predetermined period and, after that, performs a verifying operation by using a sense amplifier circuit and a comparator. When it is found as a result of the verifying operation that writing to the memory cell is insufficient, the writing operation is performed again by an instruction of a memory control circuit. At this time, the memory control circuit adjusts a write voltage.

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