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:
May. 09, 1989
Filed:
Jan. 27, 1988
Applicant:
Inventors:
Bruno Broich, Baden, CH;
Jens Gobrecht, Gebenstorf, CH;
Peter Roggwiller, Neerach-Riedt, CH;
Jan Voboril, Nussbaumen, CH;
Assignee:
BBC Brown, Boveri & Company Limited, Baden, CH;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 22 ; 357 38 ; 357 55 ; 357 89 ; 357 90 ;
Abstract
A field-controlled thyristor having a sequence of layers consisting of anode layer, channel layer and gate regions and cathode regions, which regions are alternately arranged at the cathode side, wherein an improvement in the turn-off gain is achieved by a p-type doping of the side walls of the troughs which separate the cathode regions from each other, and/or by an additional intermediate layer which has low p-type doping and which is arranged between adjacent gate regions.