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:
Dec. 20, 1988
Filed:
Dec. 21, 1987
Applicant:
Inventors:
Helmut Strack, Munich, DE;
Helmut Herberg, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 20 ; 357 36 ; 357 86 ;
Abstract
A semiconductor power circuit breaker has several emitter zones of a width (b) less than 30 microns. The semiconductor device may be in the form of a switching transistor or a gate turn off (GTO) thyristor. The spacing (a) of the emitter zones is less than the thickness (d) of the low doped inner zone. The power circuit breaker can thus be operated up to the collector-base break-down voltage U.sub.CBO without a destruction through 'second break-down' occurring. On the other hand, high current carrying capacity is maintained, since it depends practically only on the chip surface instead of being a function of emitter area.