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:
Nov. 27, 1990
Filed:
Jan. 13, 1989
Kazuhiko Niwayama, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A light triggered thyristor having a light-receiving structure which has a light-receiving surface for receiving incident light on its top surface. The light-receiving structure comprises a base region of a first electrically conductive type exposed in the light-receiving surface, and an emitter region of a second electrically conductive type exposed in a central portion of the light-receiving surface as well as in an area extending from a part of the central portion thereof outwardly beyond the light-receiving surface, and an electrode connected to the base region and the emitter region outside the light-receiving surface, wherein a lateral resistance in the area of the base region between areas underlying the emitter region is aprpoximately equal to or larger than a lateral resistance in the area thereof below the emitter region.