Electric copper plated manner to the copper or copper alloy surface which is preprocessed making use of the acidic degreaser and its acidic degreaser which are used for the preprocessing of electric copper plating to the copper or copper alloy surface

摘要

PPROBLEM TO BE SOLVED: To provide an acid degreasing agent which can remove fat and oil components remaining by a trace amount on the surface of copper or a copper alloy, and with which white irregularity, white specking or the like are not caused even when electrolytic copper plating is applied after direct plating treatment, and to provide an electrolytic copper plating method to the surface of copper or a copper alloy using the acid degreasing agent. PSOLUTION: The acid degreasing agent comprising the respective components of ferric sulfate, a cationic surfactant, and a nonionic surfactant is used for pretreatment of electrolytic copper plating to the surface of the copper or the copper alloy. Further, when the acid degreasing agent is used under the condition where concentration of halogen ions is 0.1 g/L in addition to the incorporation of the respective components, more preferable results can be obtained. In the degreasing treatment, the liquid temperature of the acid degreasing agent is controlled to 20 to 75, this is brought into contact with the surface of copper or a copper alloy for 1 min, and the portion of the thickness of 0.01 m on the surface of the copper or copper alloy is etched away. PCOPYRIGHT: (C)2009,JPO&INPIT