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:
Oct. 23, 2001
Filed:
Dec. 17, 1999
Applicant:
Inventors:
Sungho Jin, Millington, NJ (US);
Hareesh Mavoori, Piscataway, NJ (US);
Ainissa G Ramirez, Chatham, NJ (US);
Assignee:
Agere Systems Guardian Corp., Orlando, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/504 ; B23K 1/00 ;
U.S. Cl.
CPC ...
B32B 1/504 ; B23K 1/00 ;
Abstract
The invention provides an article comprising a solder that bonds well to oxides and other surfaces to which solder bonding is problematic. The solder composition contains one or more rare earth elements, which react with the oxide or other surface to promote bonding, and further contains sufficient Au and/or Ag to act as carriers for the rare earths. Because rare earths have some solid solubility in Au and Ag, the problem of intermetallic formation is lessened or eliminated, and improved bonding to oxide surfaces is attained.