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:
Jun. 02, 1998
Filed:
Aug. 30, 1996
Applicant:
Inventors:
Assignee:
Dipsol Chemicals Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
205253 ; 205254 ; 106-125 ;
Abstract
An Sn--Bi alloy-plating bath comprises (i) Bi ions, (ii) Sn ions, (iii) ions of one metal selected from the group consisting of Cu, Co and Ag, and (iv) one member selected from the group consisting of carboxylic acids, lactone compounds, alkanesulfonic acids, alkanolsulfonic aicds, phenolsulfonic acids and salts thereof and is substantially free of lead ions. The bath permits the formation of an Sn--Bi alloy-plated film, does not form any plated film having impaired quality even at a temperature higher than about 100.degree. C. and does not form any whisker.