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:
Jul. 02, 1996
Filed:
Apr. 26, 1995
Applicant:
Inventors:
Kazuhisa Ninomiya, Tokyo, JP;
Toshiya Sato, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
3651853 ; 36518524 ; 365236 ; 36518909 ;
Abstract
An electrically erasable and programmable read only memory device enters an automatic erasing mode of operation, and repeats short erasing operation followed by confirmation of proper erased state in the automatic erasing mode, wherein the memory cell array is inspected to see whether or not each memory cell not only enters the erased state but also remains in enhancement mode so that the memory cell array is exactly programmed in a programming mode of operation.