Patent ID: 8828131

Claim:
A catalyst application solution for plating an insulating portion of an object to be plated comprising the insulating portion, the catalyst application solution comprising the following components: (A) a water-soluble palladium compound selected from the group consisting of palladium oxide, palladium chloride, palladium nitrate, palladium acetate, sodium palladium chloride, potassium palladium chloride, ammonium palladium chloride, palladium sulfate, and tetraammine palladium chloride, in concentration of 0.0001 to 0.01 mol/L; (B) a reducer selected from the group consisting of hypophosphorous acid and salt thereof, boron hydride and salt thereof, dimethylamine borane, and trimethylamine borane, in concentration of 0.005 to 1 mol/L; (C) a dispersant selected from the group consisting of a polymer surfactant, an anionic surfactant, a cationic surfactant, and an amphoteric surfactant, in concentration of 0.01 to 10 g/L; (D) a catechol in concentration of 0.01 to 50 g/L; (E) a copper-oxidation inhibitor selected from the group consisting of ascorbic acid, glyoxylic acid, phosphorous acid, sulfurous acid, and salts thereof, and formaldehyde, in concentration of 0.001 to 0.5 mol/L; and (F) a pH buffering agent selected from the group consisting of citric acid, acetic acid, phosphoric acid, and salts thereof in concentration of 0.005 to 0.5 mol/L, and wherein the catalyst application solution has a pH of at least 4.