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. 07, 1994
Filed:
May. 19, 1992
Hironobu Nakao, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A non-volatile storage device such as a PROM (Programmable Read Only Memory). To obtain an adequate sum of captured charges by a low storing voltage and to prevent charges from being injected from a gate electrode, a silicon oxide film, a composite silicon oxide/nitride film and a silicon oxide film are formed in order on a gate region of a silicon substrate on which a source region and a drain region are formed. Since the composite silicon oxide/nitride film has many interfaces between the silicon oxide region and the silicon nitride region, it accumulates a lot of charges from the silicon substrates.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile