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. 27, 1999
Filed:
Jun. 03, 1997
Applicant:
Inventor:
Hideaki Fujiwara, Gifu, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257317 ; 257314 ; 257319 ; 257320 ; 257321 ; 36518526 ;
Abstract
A non-volatile semiconductor memory device accurately stores multivalued data with reduced damage to an insulating layer. The non-volatile semiconductor memory device includes a floating gate electrode configured to be divided into at least two portions. The first portion is employed for accumulating carriers migrating from at least one control gate electrode through a gate insulating layer to the floating gate electrode.