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. 19, 1989
Filed:
Jun. 22, 1988
Wolfgang Gross, Unterfohring, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A power thyristor includes a semiconductor body having first and second main surfaces, the first main surface being planar; at least first and second metal electrodes disposed at least on the first main surface; the first electrode having a contact surface lying in a first plane parallel to the first main surface; the second electrode having a contact surface lying in a second plane parallel to the first main surface; the contact surface of the first electrode being further from the first main surface than the contact surface of the second electrode; the first electrode being formed of first and second layers and the second electrode being formed of a metal with a given thickness; the first layer being adjacent the first main surface and being formed of polycrystalline silicon; and said second layer being disposed on the first layer and being formed of the same metal with the same given thickness as the second electrode.