Flash memory array and decoding architecture

Details Flash memory array and decoding architecture Flash memory array and decoding architecture

1998-09-24

1999-09-14

Phan, Trong

Static information storage and retrieval

Floating gate

Particular connection

36518505, 36518523, G11C 1604, G11C 1606

Patent

active

059532505

ABSTRACT:
A flash memory circuit includes a word line decoder with even and odd word line latches and a source line decoder with a source line latch. The word line decoders and the source line decoder provide the capability of erasing the memory cells of two adjacent word lines in a flash memory simultaneously and verifying the memory cells word line by word line. By erasing two adjacent rows simultaneously, the embodiments of this invention eliminate over-erasure and source disturbance problems associated with conventional flash memory circuits. The decoding architecture provides flexible erase size that may be from a pair to a large number of multiple pairs of word lines. By dividing the memory cells of a word line into a number of segments and having segmented source lines controlled by source segment control lines and transistors, the decoding circuit further provides the capability of selecting the memory cells of a word line segment for erasing. Several different approaches are presented for the layout of source segment control lines and transistors as well as the word lines.

REFERENCES:
patent: 4949309 (1990-08-01), Rao
patent: 5200922 (1993-04-01), Rao
patent: 5546402 (1996-08-01), Niijima et al.
patent: 5548551 (1996-08-01), Wang et al.
patent: 5646890 (1997-07-01), Lee et al.
patent: 5671177 (1997-09-01), Ucki
patent: 5687121 (1997-11-01), Lee et al.
patent: 5822252 (1998-10-01), Lee et al.

Affiliated with

Also associated with

Rating

Flash memory array and decoding architecture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flash memory array and decoding architecture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flash memory array and decoding architecture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1516408