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. 13, 1984
Filed:
Apr. 05, 1982
Applicant:
Inventors:
Louis C Parrillo, Warren, NJ (US);
George W Reutlinger, Florham Park, NJ (US);
Li-Kong Wang, Martinsville, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
29571 ; 2957 / ; 2957 / ; 29578 ; 148-15 ; 148187 ; 148190 ; 148191 ; 357 23 ; 357 42 ; 357 52 ;
Abstract
A process for forming chanstops in complementary transistor integrated circuit devices which involves only a single extra masking step yet permits close control of the doping in the chanstops. The process is advantageously used starting with a twin-tub structure for forming CMOS integrated circuit devices.