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:
Dec. 08, 2009
Filed:
Dec. 20, 2002
Applicants:
Jochen Kraft, Bruck/Mur, AT;
Bernhard Loeffler, Gleisdorf, AT;
Georg Roehrer, Graz, AT;
Inventors:
Assignee:
Austriamicrosystems AG, Unterpremstätten, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/737 (2006.01);
U.S. Cl.
CPC ...
Abstract
A transistor includes an emitter, a collector, and a base layer having a base contact. The base layer includes an intrinsic region between the emitter and the collector, an extrinsic region between the intrinsic region and the base contact, and a first doping layer that is doped with a trivalent substance, that extends into the extrinsic region, and that is counter-doped with a pentavalent substance in a region adjacent to the emitter.