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. 30, 1991
Filed:
Feb. 12, 1990
Applicant:
Inventor:
Ranjan Dutta, Lawrenceville, NJ (US);
Assignee:
AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437184 ; 437192 ; 357 65 ; 357 67 ; 148D / ;
Abstract
An ohmic contact to III-V semiconductor material comprises substantially eighty to ninety-five percent by weight of tungsten, five to ten percent by weight of antimony, and zero to fifteen percent by weight of indium. The materials are simultaneously sputtered from separate targets in a sputtering reactor.