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:
May. 15, 1990
Filed:
Oct. 26, 1983
Applicant:
Inventors:
Yasunobu Kosa, Kodaira, JP;
Shinji Shimizu, Koganei, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 235 ; 357 239 ; 357 2311 ; 357 2314 ; 357 49 ; 357 52 ; 357 54 ; 357 55 ; 357 59 ; 357 71 ;
Abstract
A semiconductor memory device and a method of manufacturing the device wherein a field insulation is formed in a surface of a semiconductor body except for the source, drain and channel regions, a first floating gate is self-aligned to the channel region, a second gate insulated from the first floating gate covers the first floating gate and the first insulator having a width substantially same as the length of the channel region between the source and the drain regions.
Kosa, Yasunobu. (1990). Semiconductor memory device and a method of manufacturing the same (U.S. Patent No. 4926222). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4926222
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile