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:
Apr. 12, 2011
Filed:
Jul. 12, 2004
Applicant:
David Casey, Oldham, GB;
Inventor:
David Casey, Oldham, GB;
Assignee:
Zetex PLC, Oldham, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A bipolar transistor with a specific area resistance less than about 500 mOhms·mmcomprises a first semiconductor region of a first conductivity type defining a collector region (). A second semiconductor region of a second conductivity type defines a base region (). A third semiconductor region of the first conductivity type defines an emitter region (). A metal layer provides contacts () to said base () and emitter regions (). The metal layer has thickness greater than about 3 μm.