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:
Jul. 07, 1981
Filed:
Sep. 06, 1979
Applicant:
Inventor:
Gerard Nuzillat, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 40 ; 357 34 ; 357 35 ; 357 36 ; 357 46 ; 357 48 ; 357 92 ;
Abstract
A structure for logic circuits comprises a current source formed by a PNP transistor and two complementary transistors integrated on the same N-type substrate. A buried plate and P-type walls forms insulating housings. These two complementary transistors are of the vertical type and the PNP transistor has the buried layer as its collector. This buried layer and the insulating walls enable current to be injected into the PNPN structure which eliminates the need for surface interconnection networks and increases the integration density.