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. 08, 1980
Filed:
Apr. 04, 1978
Applicant:
Inventors:
Gunther Bergmann, Blaustein-Arnegg, DE;
Hermann Clauss, Leingarten, DE;
Assignee:
Licentia Patent-Verwaltungs-G.m.b.H, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
148175 ; 2957 / ; 29578 ; 148-15 ; 148187 ; 357 35 ; 357 36 ; 357 44 ; 357 46 ; 357 92 ;
Abstract
A method of manufacturing an integrated circuit including an analog circuit and an I.sup.2 L circuit which both contain NPN transistors on a P-type semiconductor chip in which the method includes an N.sup.+ diffusion step for producing a flat diffusion for certain NPN transistors having smaller penetration depth than N.sup.+ regions of the other NPN transistors for connection of an emitter electrode to the said certain NPN transistors.