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:
Jan. 23, 1996
Filed:
Mar. 31, 1994
Applicant:
Inventors:
Assignee:
W.C. Heraeus GmbH, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H05K / ;
U.S. Cl.
CPC ...
257666 ; 257748 ; 257750 ; 257762 ; 257766 ; 257768 ; 361813 ;
Abstract
Lead frames completely surface-plated with palladium have a nickel-phosphorus or copper-tin layer between the base element, made for example of copper, and the palladium layer. Such lead frames exhibit good bondability and good solderability without tinning.