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:
Mar. 31, 1998
Filed:
Jan. 31, 1997
Paul W Sanders, Scottsdale, AZ (US);
Troy E Mackie, Chandler, AZ (US);
Julio C Costa, Phoenix, AZ (US);
John L Freeman, Jr, Mesa, AZ (US);
Alan D Wood, Mesa, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A semiconductor device (10) is formed in a semiconductor substrate (11) that acts as a collector region. A base region (12) is formed in the semiconductor substrate (11) and an emitter region (52) is formed such that it contacts at least a portion of the base region (12). A conductive layer (28) is used to provide electrical connection to the emitter region (52). The portion of the conductive layer (28) above the emitter region (52) is counter-doped to address the problems of an interfacial oxide layer (27) that exists between the emitter region (52) and the conductive layer (28).