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:
Dec. 24, 1991
Filed:
Jul. 31, 1990
Applicant:
Inventors:
Francis J Carney, Gilbert, AZ (US);
Cary B Powell, Gilbert, AZ (US);
George F Carney, Tempe, AZ (US);
Marion I Simmons, Tempe, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
437230 ; 437246 ; 437247 ; 437248 ; 148269 ; 148282 ; 427 98 ; 427433 ; 427437 ;
Abstract
A method for improving the bonding characteristics of TAB semiconductor packages to circuit boards is achieved by plating additional amounts of tin on the TAB semiconductor package leads after final package assembly is complete. Residues from the plating step are removed from the package assembly to prevent contamination. Stresses that were developed in the plated material during the plating step are removed by heating the leads.