Patent ID: 7482111

Claim:
A process for producing a plated shaped article, comprising: (1) a step of forming on a wafer having a barrier metal layer a resin film composed of the negative radiation-sensitive resin composition, wherein the negative radiation-sensitive resin composition comprises: (A) a polymer containing structural units represented by the following formula (1) or structural units represented by the following formula (1) and the following formula (2): wherein R 1 is a hydrogen atom or a methyl group, R 2 is —(CH 2 ) n —, n is an integer of 0 to 3, R 3 is an alkyl group of 1 to 4 carbon atoms, and m is an integer of 0 to 4, (B) a compound having at least one ethylenically unsaturated double bond, and (C) a radiation-sensitive radical polymerization initiator which is at least one compound selected from acylphosphine oxides, 2,2-dimethoxyl-1,2-diphenylethane-1-one, benzyl dimethyl ketal, benzyl-β-methoxyethyl acetal, 1-phenyl-1,2-propanedione-2-(o-ethoxycarbonyl) oxime and 2,2′-bis(2,4-dichlorophenyl)-4,5,4′,5′-tetraphenyl-1-2′-bisimidazole; (2) a step of exposing the resin film and then developing the resin film to form a pattern, (3) a step of depositing an electrode material by electroplating using the pattern as a mold, and (4) a step of stripping the remaining resin film and then removing the barrier metal by etching.