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:
Apr. 28, 1998
Filed:
Jun. 11, 1996
Applicant:
Inventors:
Shinichi Kobayashi, Hyogo-ken, JP;
Yasushi Terada, Hyogo-ken, JP;
Yoshikazu Miyawaki, Hyogo-ken, JP;
Takeshi Nakayama, Hyogo-ken, JP;
Tomoshi Futatsuya, Hyogo-ken, JP;
Natsuo Ajika, Hyogo-ken, JP;
Yuichi Kunori, Hyogo-ken, JP;
Hiroshi Onoda, Hyogo-ken, JP;
Atsushi Fukumoto, Hyogo-ken, JP;
Makoto Ohi, Hyogo-ken, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518529 ; 365218 ; 36518524 ;
Abstract
In erasing, electrons are simultaneously injected into floating gates from sources of a plurality of memory cells. Thus, the threshold voltages of the plurality of memory cells are increased. In programming, electrons are emitted from a floating gate of a selected memory cell to a drain. Thus, the threshold voltage of the selected memory cell is reduced.