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. 26, 1987
Filed:
Dec. 02, 1985
Applicant:
Inventors:
Yuji Yatsuda, Tsukui, JP;
Takaaki Hagiwara, Nishitama, JP;
Masatada Horiuchi, Koganei, JP;
Shinichi Minami, Hachioji, JP;
Toru Kaga, Kokubunji, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 235 ; 357 54 ; 365185 ;
Abstract
In a semiconductor device which includes an insulation film through which a charge can tunnel, a gate insulation film of a material different from the material of said insulation film or having a thickness different from that of said insulation film, and a floating gate extending over said tunnelable insulation film, the improvement wherein at least two sides of said tunnelable region are bounded by a device separation oxide film.