Patent ID: 7754062

Claim:
An electroless plating method, comprising contacting an acrylonitrile butadiene styrene plating material which has unsaturated bonds with a first aqueous solution which comprises 50-100 ppm of ozone, then immersing the plating material in a second aqueous solution having a pH value of more than 12 and which comprises at least one of (i) sodium lauryl sulfate and (ii) polyoxyethylene docecyl ether, and also comprises sodium hydroxide, to adsorb at least one of the sodium lauryl sulfate and the polyoxyethylene docecyl ether on the surface of the plating material, then immersing the plating material having at least one of the sodium lauryl sulfate and the polyoxyethylene docecyl ether adsorbed on a surface thereof in a catalyst liquid comprising a palladium chloride/tin chloride catalyst, to adsorb the catalyst on at least one of the sodium lauryl sulfate and the polyoxyethylene docecyl ether adsorbed on the surface of the plating material, then electroless plating a Ni—P coating onto the plating material having a catalyst adsorbed thereon by immersing the plating material in a Ni—P bath; then electroplating the plating material having a Ni—P coating with a Cu coating by immersing the plating material having a Ni—P coating in a copper sulfate bath to form a plating material having a Cu plating; wherein the Ni—P plated coating is adhered to the plating material with an adhesive strength of from 520 to 650 g/cm; wherein the electroless plating method is carried out without roughening the acrylonitrile butadiene styrene plating material by etching or ozone gas treatment prior to plating the plating material.