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:
Apr. 16, 1991
Filed:
Nov. 09, 1988
Yoshio Hattori, Tokyo, JP;
Seiko Instruments Inc., , JP;
Abstract
A semiconductor variable capacitance element can provide a stable capacitance value by making a direct current voltage constant applied between a capacitive region and a first capacitance electrode. The capacitive region is formed under the surface of a semiconductor substrate and the first capacitance electrode is capacitively coupled to a floating electrode insulated from the semiconductor substrate. The floating electrode stores electric charge to build up an electrical potential in the floating electrode according to the stored amount of electric charge to thereby determine an amount of capacitance of the capacitive region.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile