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. 01, 1992
Filed:
Feb. 01, 1991
Applicant:
Inventor:
Friedhelm Bauer, 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 38 ; 357 37 ; 357 39 ; 357 234 ; 357 15 ;
Abstract
In an MOS-controlled power semiconductor device with switch-off facility having a thyristor-like structure, the switch-off capability is improved by inserting emitter ballast resistors between the first main electrode (H1) and the associated emitter region (8). For this purpose, the emitter region (8) is of annular or strip-like construction and encloses a more weakly doped central region (9) which is exclusively contacted by the first main-electrode metallization (2).