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:
Mar. 16, 1999
Filed:
May. 19, 1997
Applicant:
Inventor:
Noriaki Kodama, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518528 ; 36518501 ; 36518526 ;
Abstract
In a memory cell including a floating gate, a gate insulation film and a control gate, after removing injected charges from the floating gate with tunneling currents through the gate insulation film, charges are removed from the gate insulation film by applying a pair of positive and negative voltage pulses to the control gate at least one time.