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. 22, 1981
Filed:
Jun. 20, 1980
Sebastian W Kessler, Jr, San Mateo, CA (US);
John A Olmstead, Somerville, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
A semiconductor power device comprises a semiconductor pellet having first and second opposing major surfaces, including, in series, emitter, base and collector regions of alternate conductivity type. The collector region is substantially planar and adjacent to the second surface, the base region is adjacent to the collector region and extends to the first surface, and the emitter region extends relatively deeply into the pellet from the first surface and is substantially surrounded by the base region. The emitter region substantially surrounds a substantially centrally located extension of the base region, this extension being of relatively high resistance and also terminating at the first surface. An emitter electrode contacts the emitter region and the base region extension, a collector electrode contacts the collector region, and a base electrode contacts the base region.