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. 27, 1982
Filed:
Apr. 28, 1980
Applicant:
Inventor:
Kyoung Kim, San Jose, CA (US);
Assignee:
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 41 ; 357 13 ; 357 20 ; 357 23 ; 357 51 ; 357 68 ;
Abstract
A new input protection device for integrated circuits in which the metal-semiconductor contact between a metal line from a metal input pad and doped semiconductor region in the substrate leading to the rest of the integrated circuit is significantly rounded. This reduces the tendency of high current densities to flow through specific areas of the contact creating a short-circuiting metal-semiconductor spike into the substrate. Furthermore, the contact is enlarged beyond the normal size of contacts within the integrated circuit and the conducting region below is formed deeper and laterally away from the contact for further protection.