Copper - zinc alloy electroplating bath and plating method using the same

    公开(公告)号:JP5274817B2

    公开(公告)日:2013-08-28

    申请号:JP2007304377

    申请日:2007-11-26

    IPC分类号: C25D3/58

    摘要: PROBLEM TO BE SOLVED: To provide a copper-zinc alloy electroplating bath which can form a uniform and gloss alloy layer having the objective composition without using a cyanide even at higher current density than heretofore, and has excellent productivity. SOLUTION: The copper-zinc alloy electroplating bath comprises: a copper salt; a zinc salt; an alkali metal pyrophosphate salt; and amino acid or its salt, and in which the concentration of the amino acid or the salt thereof is 0.08 to 0.22 mol/L. As the amino acid or the salt thereof, histidine or the salt thereof can be suitably used. The pH of the copper-zinc alloy electroplating bath suitably lies in the range of 10.5 to 12. COPYRIGHT: (C)2009,JPO&INPIT