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:
Aug. 03, 1982
Filed:
Mar. 12, 1981
Andre Jaecklin, Ennetbaden, CH;
BBC Brown, Boveri & Company, Limited, Baden, CH;
Abstract
A light-ignitable thyristor formed of a main thyristor and an auxiliary thyristor integrated on a common wafer, wherein in order to reduce the ignition ratio between the main and auxiliary thyristors, the length of the cathode emitter edge near the gate of the main thyristor is shortened by forming anode base zone ducts which reach up to the cathode side surface between portions of the main thyristor gate and cathode zones. The width of the anode base zone areas formed on the cathode surface side is selected such that during the entire ignition process, a narrow space charging zone acting as an insulation zone remains at least partially around the PN junction bordering the surface areas of the anode base zone.