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:
Oct. 30, 1990
Filed:
Aug. 21, 1989
Applicant:
Inventors:
Friedhelm Bauer, Wurenlingen, CH;
Horst Gruning, Baden, CH;
Assignee:
Asea Brown Boveri Ltd., Baden, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 37 ; 357 234 ; 357 20 ; 357 38 ; 357 43 ;
Abstract
In a controllable power semiconductor component having a pnpn layer sequence of p-type emitter layer (9), n-type base layer (8), p-type base layer (7) and n-type emitter layer (5) the critical increased field rise during turn-off is reduced as a result of an intermediate layer (11), which has a higher n-doping than the n-type base layer (8) and which is inserted between the n-type base layer (8) and the p-type base layer (7).