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:
Feb. 07, 1978
Filed:
May. 04, 1976
Fritz Kirschner, Lohhof, DT;
Siemens Aktiengesellschaft, Berlin & Munich, DT;
Abstract
A thyristor comprising a semiconductor element is described which has at least four zones of alternate conductivity type with a shunt between an outer zone which serves as an emitter and an adjacent inner zone which serves as a base. A strip shape control electrode is arranged along one edge of the adjacent zone, and an emitter electrode is arranged in contact with substantially all of the outer surface of the emitter. The emitter electrode is provided with a large number of openings arranged in a regular pattern, through which openings portions of the adjacent zone extend into contact with the emitter electrode. The emitter openings are located at the intersection points between first lines running parallel to one another on the one hand, and at second lines which are repeated in a regular sequence parallel to one another and inclined toward the emitter electrode at an angle .theta. which is less than 90.degree. and greater than 45.degree..