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:
May. 23, 2017
Filed:
Dec. 06, 2012
Msc Co., Ltd., Incheon, KR;
S&s Chem Co., Ltd., Yoeongi-gun Chungcheongnam-do, KR;
Dong Hyun Kim, Jeju-si, Jeju-do, KR;
Tae JO Bang, Anyang-si, Gyeonggi-do, KR;
Dong Hyun Kim, Jeju-si, KR;
Tae Jo Bang, Anyang-si, KR;
Jeong Hun Oh, Siseung-si, KR;
Jin Ho Son, Anyang-si, KR;
Hong Ki Kim, Seoul, KR;
Jeong Dae Kim, Cheongju-si, KR;
Jeong Nan Yuk, Bucheon-si, KR;
Abstract
A method is described of preparing a tin-silver (Sn—Ag) alloy plating solution containing methanesulfonic acid tin, methanesulfonic acid silver, methanesulfonic acid, and an additive, wherein the method includes: (a) eliminating impurities such as released chloride compounds and released sulfur compounds, which are present in the methanesulfonic acid, (b) preparing the methanesulfonic acid tin and the methanesulfonic acid silver by dissolving, through an electrolytic process, tin and silver in the methanesulfonic acid from which the impurities are eliminated; (c) producing a mixture solution by adding the methanesulfonic acid, the methanesulfonic acid tin, the methanesulfonic acid silver, and the additive; and (d) filtering the mixture solution. And by the method thereof, current efficiency may be increased and a desirable plating film may be maintained by eliminating the impurities from the methanesulfonic acid used as a base material and preparing the Sn—Ag alloy plating solution.