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:
Nov. 16, 2004
Filed:
Apr. 25, 2002
Applicant:
Inventors:
Tomonari Ohtsuki, Tokyo, JP;
Yasue Yamazaki, Tokyo, JP;
Assignee:
DDK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/348 ; H01L 2/352 ; H01L 2/940 ;
U.S. Cl.
CPC ...
H01L 2/348 ; H01L 2/352 ; H01L 2/940 ;
Abstract
In an electronic component provided with an electric contact(s) producing an electric conduction by contacting with a contact(s) of a second electronic component, the electric contact comprises a lead-free alloy layer containing tin and silver, and a surface layer portion of the alloy layer at least contacting with the contact of the second electronic component is a tin-rich layer having a tin content higher than that of the other portion of the alloy layer.