METHOD FOR APPLYING PLATING OF IRIDIUM, PLATINUM OR ALLOY THEREFOR

摘要

PROBLEM TO BE SOLVED: To inexpensively and easily apply plating of iridium, platinum or the alloy thereof. SOLUTION: A plating solution comprising iridium trichloride, hexa chloroplatinic, amidosulfuric acid and sodium nitrate is prepared. The concentration of hydrogen ions (pH) in the plating solution is controlled to about 1 to 3, the temperature of the plating solution is kept to 60 to 90°C while performing stirring with a magnetic stirring rod, and the current density of the cathode is controlled to 1 to 3 A/dm2. COPYRIGHT: (C)2004,JPO