PROCESS FOR SURFACE TREATING PRINTED CIRCUIT BOARD

摘要

A method for surface treatment of a PCB(Printed Circuit Board) is provided to form a fine circuit under eco-friendly conditions by performing pre-etching and alkali metal solution treatment before and after a desmear process. A method for surface treatment of a PCB includes the steps of: preparing the PCB having an insulating layer with a via hole on one or both surfaces; pre-etching a surface of the insulating layer of the PCB by using a permanganic acid solution(S101); desmearing by using the permanganic acid solution after swelling smear remaining on the surface of the insulating layer of the pre-etched PCB(S102,S103); and treating the surface of the insulating layer of the desmeared PCB with an alkali metal solution of 0.1 to 5N(S104).