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. 04, 1984
Filed:
Jun. 27, 1983
Applicant:
Inventors:
Yung-Shih Chen, San Jose, CA (US);
Jagdish G Belani, Cupertino, CA (US);
Vijay Sajja, Sunnyvale, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H02B / ; H05K / ;
U.S. Cl.
CPC ...
428620 ; 428643 ; 75 / ; 357 67 ;
Abstract
A solder composition of 10 to 40 percent tin, with the balance lead, for use in thin layers of 50 to 500 microinches on copper integrated circuit leads so as to resist the formation of intermetallics when later heated.