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:
Feb. 24, 2015
Filed:
Apr. 03, 2013
Applicant:
Genusion, Inc., Hyogo, JP;
Inventors:
Assignee:
Genusion, Inc., Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 16/34 (2006.01); G11C 11/56 (2006.01);
U.S. Cl.
CPC ...
G11C 16/3431 (2013.01); G11C 11/5628 (2013.01); G11C 11/5642 (2013.01);
Abstract
A nonvolatile semiconductor memory device is provided which includes: a P-type memory cell transistor having a source, a drain, a gate, and a charge storage layer; and a control circuit which, in a case where the P-type memory cell transistor has its threshold greater than or equal to a first value (Vr) and less than or equal to a second value (Vrd), carries out a program operation of injecting electrons into the charge storage layer.