| 摘要 |
<p>Provided is a copper-zinc alloy electroplating bath which can form a copper-zinc alloy plating coating having an improved throwing property and a plating method using the same. Also provided is a copper-zinc alloy electroplating bath containing, as an additive, at least one selected from the group consisting of the compounds represented by the following formulae (I) to (III):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 2 -O-(R 1 -O) n -R 2 €ƒ€ƒ€ƒ€ƒ€ƒ(II)
(wherein R 1 represents a lower alkylene group, R 2 represents H or a lower alkyl group, and the weight-average molecular weight is 10 3 to 10 5 ); and
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒNa-SO 3 -(CH 2 ) 3 -S-S(CH 2 ) 3 -SO 3 -Na€ƒ€ƒ€ƒ€ƒ€ƒ(III)
These additives can be used alone, and two or more of these can be used in combination.</p> |
