Patent ID: 6689641
Filing Date: 2004-02-10
Classification: H01R,H05K,Y10T

Abstract:
A method of producing a wiring board comprising: a resin insulating layer having a through hole penetrating the resin insulating layer; a filled via which is filled and formed by plating in the through hole; and a conductor layer formed by plating on the filled via and at least a portion of the resin insulating layer, which comprises:a first electrolytic plating step of subjecting a board which includes the resin insulating layer having the through hole and a first electroless plating layer formed in the through hole and on the outside of the through hole, to electrolytic plating on the first electroless plating layer with a first plating liquid by which the electrolytic plating is grown more rapidly in the inside of the through hole than on the outside of the through hole when the plating is carried out on a portion of the board including the through hole, so as to form the filled via in the through hole by plating and form a first electrolytic plating layer on the filled via and on substantially the entire surface of the first electroless plating layer of the resin insulating layer on the outside of the through hole; and a plating layer removal step of removing the first electrolytic plating layer and the first electroless plating layer on the outside of the through hole.