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. 17, 1998
Filed:
Sep. 10, 1996
Masatoshi Anma, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A structure and a manufacturing method of a semiconductor device which prevents leakage of electric charges from a floating gate electrode to outside. The semiconductor device includes a capacitor insulating film at an upper surface and opposing sidewall surfaces of the floating gate electrode, which film includes a first silicon nitride film, a first silicon oxide film, a second silicon nitride film and a second silicon oxide film stocked in this order from the bottom. In such a structure, the capacitor insulating film prevents electric charges accumulated in the floating gate electrode as information from leaking outside from the vicinity of its end portion A.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile