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:
Mar. 14, 1978
Filed:
Dec. 09, 1976
Applicant:
Inventors:
Joachim Burtscher, Munich, DT;
Helmut Strack, Munich, DT;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 20 ; 357 86 ;
Abstract
A thyristor device is provided with a shorted emitter structure in which the shorts are circularly formed zones of the base zone which extend through the emitter zone into electrical contact with the emitter electrode. Each of these zones is circular in cross-section and of a diameter which is less than 20.mu.m. These zones have a spacing from each other from center to center which is such that the ratio of this spacing to the diameter of a circular area is greater than 3.