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:
Dec. 08, 2009
Filed:
May. 02, 2000
Kiyotaka Tsuji, Kobe, JP;
Tetsuji Nishikawa, Kobe, JP;
Takao Takeuchi, Akashi, JP;
Keigo Obata, Akashi, JP;
Hidemi Nawafune, Takatsuki, JP;
Kiyotaka Tsuji, Kobe, JP;
Tetsuji Nishikawa, Kobe, JP;
Takao Takeuchi, Akashi, JP;
Keigo Obata, Akashi, JP;
Hidemi Nawafune, Takatsuki, JP;
Ishihara Chemical Co., Ltd., Kobe, JP;
Daiwa Fine Chemicals Co., Ltd., Akashi, JP;
Abstract
A silver and silver alloy plating bath, includes (A) a soluble salt, having a silver salt or a mixture of a silver salt and a salt of a metal such as tin, bismuth, indium, lead, and the like; and (B) a particular aliphatic sulfide compound, such as thiobis(diethyleneglycol), dithiobis(triglycerol), 3,3'-thiodipropanol, thiodiglycerin, 3,6-dithiooctane-1,8-diol, and the like, which contain at least one or more of an ether oxygen atom, a 1-hydroxypropyl group, a hydroxypropylene group, or two or more of a sulfide bond in the molecule, and not containing a basic nitrogen atom. Compared to baths containing aliphatic monosulfide compounds, such as thiodiglycol or beta-thiodiglycol, which do not contain an ether oxygen atom, 1-hydroxypropyl group, a hydroxypropylene group, or two or more of a sulfide bond in the molecule, by having these particular compounds, the plating bath of the present invention has excellent stability over extended time, excellent co-deposition of silver and various metals, and excellent appearance of the electrodeposition coating.