Compositions – Etching or brightening compositions
Patent
1995-02-27
1996-07-02
Le, Hoa Van
Compositions
Etching or brightening compositions
252 794, 134 3, 134 41, 1566251, 1566341, 1566541, 1566551, 1566561, C09K 1300
Patent
active
055320945
ABSTRACT:
A method for roughening surfaces of copper or copper alloy to provide an excellent adhesion of a coated or laminated layer thereon, comprising treating said surfaces with an amount and for a time effective to roughen them with an aqueous solution comprising an azole compound, a copper compound dissolvable in the solution, an organic or inorganic acid and a halogen ion.
REFERENCES:
patent: 3933531 (1976-01-01), Sawa et al.
Metal Finishing, vol. 83, No. 1, Jan. 1985, M. Bakszt, "Providing Solderability Retention By Means Of Chemical Inhibitors".
Akiyama Daisaku
Arimura Maki
Nakagawa Toshiko
Le Hoa Van
MEC Co. Ltd.
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