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:
Jun. 16, 1998
Filed:
Jun. 06, 1995
Applicant:
Inventors:
Kenichi Kuroda, Tachikawa, JP;
Toshifumi Takeda, Kodaira, JP;
Hisahiro Moriuchi, Tanashi, JP;
Masaki Shirai, Sayama, JP;
Jiroh Sakaguchi, Tama, JP;
Akinori Matsuo, Higashiyamato, JP;
Shoji Yoshida, Akishima, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi VLSI Engineering Corp., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
257318 ; 365200 ;
Abstract
A nonvolatile storage element of single-layer gate structure constructed by arranging a floating gate formed of a conductive layer to partly overlap with a control gate formed of a diffused layer is provided with a barrier layer covering a part or the whole of the surface of the floating gate. Such nonvolatile storage elements are used for redundancy control of defects or change of functions.