| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel plating bath which is excellent in uniform electrodeposition properties and does not use boron and with which plating cost is reduced. SOLUTION: The nickel plating bath contains, as a nickel ion source, nickel chloride and/or nickel sulfate in a concentration of 1-20 g/L expressed in terms of nickel ion and citric acid in a concentration of 50-300 g/L expressed in terms of citric acid monohydrate, and is controlled to have a pH of 6.5-10 by the addition of ammonia. COPYRIGHT: (C)2009,JPO&INPIT
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