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, 1977
Filed:
Jul. 22, 1974
Applicant:
Inventors:
Tsutomu Yatsuo, Hitachi, JA;
Katsumi Akabane, Hitachi, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 20 ; 357 86 ;
Abstract
A semiconductor controlled rectifying device comprising a semiconductor substrate having four layers of PNPN, a couple of main electrodes in ohmic contact with the outside ones of the four layers respectively, a gate electrode provided on the intermediate P layer, an N-type minor region formed in the intermediate P layer in the vicinity of the gate electrode, and a conductor in contact with part of the outside N layer and with the minor region and disposed along the outer periphery of the outside N layer on the intermediate P layer.