| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface processing method for a multilayer printed board for quick and effective surface processing. SOLUTION: A high-frequency power source 21 causes corona a discharge between a first electrode 22 and a second electrode 24. The electric discharge generated at the first electrode 22 converges in a conductive layer 102 exposed within a hole 104 to remove a smear 105 remaining inside the hole 104. A part of the electric discharge generated from the first electrode 22 is made to irradiate on the hole formation surface of a board 100, allowing the hole formation surface to be hydrophilic. With this processing method, a dielectrics 23 coated on the first electrode 22 functions as an aggregate of micro capacitors so that no electric discharge is converged on a specific position, giving no damage on the hole formation surface and the like. |
