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:
Oct. 09, 1984
Filed:
Apr. 01, 1981
Applicant:
Inventors:
James C Yu, San Jose, CA (US);
Suman H Patel, Sunnyvale, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 2313 ; 357 13 ; 357 42 ; 357 43 ; 357 44 ;
Abstract
A CMOS gate protection diode clamping the input terminal to substrate potential is prevented from injecting carriers into the substrate and causing SCR latchup by forming the diode as a well to substrate junction, surrounded by another, reverse-biased, well, to both reduce injection and collect parasitic injected carriers before they can diffuse to cause latchup.