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. 01, 2013
Filed:
Mar. 18, 2009
Applicants:
Hideki Mizuhara, Moriguchi, JP;
Hajime Kobayashi, Moriguchi, JP;
Toshiya Shimizu, Moriguchi, JP;
Inventors:
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/52 (2006.01); H01L 23/48 (2006.01); H01L 29/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention provides a solder structure which is least likely to develop Sn whiskers and a method for forming such a solder structure. The solder structure includes an Sn alloy capable of a solid-liquid coexistent state and an Au (or Au alloy) coating covering at least part of the surface of the Sn alloy. The Au covering is a film that covers and coats at least part of the surface of the Sn alloy. As a preferable mode, the Au coating forms a netlike structure on the surface of the Sn alloy. The thickness of the Au coating is, for instance, 1 to 5 μm.