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. 02, 1991
Filed:
Apr. 05, 1990
Applicant:
Inventors:
Joseph J Bendik, Encintas, CA (US);
Stuart C Billette, Hawthorne, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; B23K / ;
U.S. Cl.
CPC ...
228123 ; 228124 ; 437190 ; 357 71 ;
Abstract
An improved silicon chip metallization system for use in attaching silicon chips to substrates. The improvement comprises providing a layer of titanium between the silicon chip backside and the layers of chrome and gold which are conventionally used as the backside metallization. The layer of titanium adjacent to the silicon chip backside reduces silicon dioxide formation during chip attachment procedures carried out in non-vacuum environments.