System and method for preventing read margin degradation for...

Static information storage and retrieval – Floating gate – Particular biasing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C365S185210, C365S185220, C365S185240, C365S185280, C365S185290

Reexamination Certificate

active

10997114

ABSTRACT:
An ultra cycling nitride read only memory (NROM) device is coupled to a NROM array such that both bits of the ultra cycling NROM device will be erased when all NROM devices of the NROM array are erased. The ultra cycling NROM device is then programmed at its right bit. A threshold voltage difference will be obtained for the ultra cycling NROM device for the un-programmed left bit. Next, a cycling number is obtained based on the threshold voltage difference for the ultra cycling NROM device. A threshold voltage shift can be found based on the cycling number for the NROM array. Finally, an erase voltage will be calculated according to the threshold voltage shift for the NROM array. If the NROM array is programmed again, the erase voltage will be applied to un-programmed NROM devices of the NROM array to further reduce the threshold voltages.

REFERENCES:
patent: 6307784 (2001-10-01), Hamilton et al.
patent: 6643177 (2003-11-01), Le et al.
patent: 6690602 (2004-02-01), Le et al.
patent: 6711062 (2004-03-01), Chou
patent: 6760267 (2004-07-01), Chevallier et al.
patent: 6954379 (2005-10-01), Chou
patent: 2003/0161188 (2003-08-01), Takahashi et al.
patent: 2005/0117444 (2005-06-01), Maayan et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

System and method for preventing read margin degradation 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 System and method for preventing read margin degradation for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for preventing read margin degradation for... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3886579

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.