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. 07, 1993
Filed:
Feb. 03, 1992
Applicant:
Inventor:
George W Conner, Ben Lomond, CA (US);
Assignee:
Philips Electronics North America Corp., New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437 31 ; 437 32 ; 437 33 ; 437 70 ; 437917 ; 148D / ; 148D / ;
Abstract
A bipolar transistor device having reduced collector-base capacitance and advantageous extrinsic base resistance properties is fabricated by a self-aligned process. Successively formed first and second self-aligned masking spacers are utilized to define the collector-base junction area and to permit the conductivity of base link and base contact portions of the extrinsic base to be independently established.