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:
Sep. 07, 1976
Filed:
Sep. 20, 1973
Josuke Nakata, Itami, JA;
Ryuji Denda, Itami, JA;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JA;
Abstract
A semiconductor switching device is disclosed which includes a wafer comprising at least four semiconductive layers with adjacent layers being of opposite conductivity type to form a plurality of P-N junctions. At least part of the P-N junction between one outer layer of the four semiconductive layers and an adjacent layer is shunted by an additional layer formed in the wafer. The additional layer forms an electrical resistance path across the P-N junction, and is prepared by sintering or alloying a metal layer into the wafer material. A method of making the semiconductor switching device is also disclosed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile