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:
Aug. 07, 1990
Filed:
Apr. 06, 1989
Ravinder K Sharma, Mesa, AZ (US);
William H Lytle, Chandler, AZ (US);
Angela Rogona, Phoenix, AZ (US);
Bennett L Hileman, Tempe, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A backside metalization scheme for semiconductor devices includes a vanadium layer disposed on the backside of a wafer and a silver layer disposed on the vanadium layer. An optional intermediate layer comprising either a mixture of vanadium and silver or nickel may be disposed between the vanadium layer and the silver layer. The vanadium layer exhibits excellent adhesion characteristics on the backside of wafers having a finish at least as fine as a 300 grit equivalency while the silver layer exhibits excellent solderability characteristics.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile