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, 1981
Filed:
Apr. 17, 1980
Applicant:
Inventors:
Martin P Lepselter, Summit, NJ (US);
Simon M Sze, Murray Hill, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 35 ; 357 59 ; 357 67 ; 357 89 ;
Abstract
A bipolar transistor NPN structure (20) is constructed at a major surface of a silicon body with a P-type polycrystalline silicon electrode (13) contacting a P-type base zone (13.6). Excess acceptor impurities from the polycrystalline silicon electrode (13) are diffused into the base zone (13.6) in order to tailor its conductivity profile.