Nonvolatile semiconductor memory including memory cell for...

Details Nonvolatile semiconductor memory including memory cell for... Nonvolatile semiconductor memory including memory cell for...

2008-09-04

2010-10-05

Le, Vu A (Department: 2824)

Static information storage and retrieval

Floating gate

Multiple values

C365S185220

Reexamination Certificate

active

07808821

ABSTRACT:
A write controller performs verification for checking whether each memory cell is on a predetermined verification level. For a memory cell to be written to a voltage level higher than the predetermined verification level, the write controller stores, in first and second latch circuits, the number of times of write to be performed by a write voltage after the verification. Whenever write is performed by the write voltage, the write controller updates the number of times of write stored in the first and second latch circuits. After write is performed the number of times of write by the write voltage, the write controller performs write by an intermediate voltage lower than the write voltage.

REFERENCES:
patent: 5986929 (1999-11-01), Sugiura et al.
patent: 6400601 (2002-06-01), Sudo et al.
patent: 6545909 (2003-04-01), Tanaka et al.
patent: 6707719 (2004-03-01), Shibata et al.
patent: 7301817 (2007-11-01), Li et al.
patent: 2003-196988 (2003-07-01), None
U.S. Appl. No. 11/780,656, filed Jul. 20, 2007, Noboru Shibata.

Affiliated with

Also associated with

Rating

Nonvolatile semiconductor memory including memory cell for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nonvolatile semiconductor memory including memory cell for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonvolatile semiconductor memory including memory cell for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4181110