Patent ID: 7981202
Filing Date: 2011-07-19
Classification: C23C

Abstract:
1. An electroless pure palladium plating solution comprising an aqueous solution comprising (a) 0.001 to 0.5 mol/liter of palladium chloride; and (b) 0.005 to 10 mol/liter of at least two members selected from the group consisting of aliphatic carboxylic acids and water-soluble salts thereof, wherein said at least two members comprises formic acid or formate and at least one selected from the group consisting of aliphatic (hydr)oxycarboxylic acid and aliphatic polycarboxylic acid; the aqueous solution further comprises (c) 0.005 to 10 mol/liter of phosphoric acid and/or a phosphate, (d) 0.005 to 10 mol/liter of sulfuric acid and/or a sulfate, and (e) ammonia and/or amine compound.