The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2019
Filed:
Jun. 26, 2018
Applicant:
Integrated Silicon Solution, (Cayman) Inc., Grand Cayman, KY;
Inventor:
Sung Jin Yoo, San Jose, CA (US);
Assignee:
Integrated Silicon Solutions, (Cayman) Inc., Grand Cayman, KY;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 16/04 (2006.01); G11C 29/50 (2006.01); G11C 16/14 (2006.01);
U.S. Cl.
CPC ...
G11C 29/50 (2013.01); G11C 16/0433 (2013.01); G11C 16/14 (2013.01); G11C 2029/5002 (2013.01); G11C 2029/5006 (2013.01);
Abstract
A transconductance test method implemented in a flash memory device detects memory cells with low transconductance and provides an output identifying memory cells, if any, having been classified as having a low transconductance (low g). In some embodiments, the transconductance test method implements multi-step testing using a pair of gate bias levels for each test step. Accurate detection of memory cells with low transconductance can be realized.