| 摘要 |
PROBLEM TO BE SOLVED: To provide a practical platinum plating bath which has neutral pH, is hardly decomposed at an anode side, can attain a high current efficiency and a high plating speed, and besides does not include sodium or potassium of an inhibition element. SOLUTION: The platinum plating bath includes an A component consisting of one or more kinds selected from the group consisting of diamminedenitroplatinum, hexahydroxoplatinum, hexaammineplatinum hydroxy salt, and hexachloroplatinate of water-soluble platinum salt, and a B component consisting of one or more kinds selected from the group consisting of glycin, iminodiacetic acid, and nitrilotriacetic acid.
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