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. 04, 1991
Filed:
Mar. 20, 1989
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 39 ;
Abstract
A gate turn-off thyristor includes a cathode emitter of n-type, a cathode base of p-type, an anode base of n-type and an anode emitter of p-type. A gate electrode is electrically connected to the p cathode base to enclose and define an elemental gate turn-off thyristor region. A plurality of n cathode emitter regions are arranged in proximity to each other in the elemental gate turn-off thyristor region. A highly-doped buried gate region is provided in the p cathode base with the substantially identical configuration for each n cathode emitter regions.