| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a copper plated wire with its good workability, low cost, and good quality in an extremely thin coaxial wire to be used as a high-frequency transmission line. SOLUTION: In a pre-electrolytic processor 100, plural plated wire rods s arranged in parallel is continuously run at a speed of 0.1m per second to 0.5m per second, and these plated wire rods s are put into a copper sulfate plating bath Y in an overflow reservoir 31 and linearly passed. In addition, the wire rod is brought into contact with the peripheral face (power supply conductor face) of a power supply roller 22 by which a constant voltage Vc is supplied, a copper plated thin film intermediate layer is formed by means of flush plating, and a plating wire s' is obtained. A copper plating layer is formed by means of electric plating, and a copper plating wire is obtained. The composition of said copper-sulfate plating solution Q is 80 to 120g/l in copper sulfate and 80 to 120g/l in sulfuric acid (specific gravity 1.84). |
