Patent ID: 7514637

Claim:
A method for manufacturing a multilayer printed circuit board of the present invention, characterized by containing at least the following processes (a) to (e): (a) a process of forming a resin insulating layer having an opening part for a via-hole by exposure and development treatment or laser treatment; (b) a process of forming a metal layer comprising at least one element selected from the group consisting of Cu, Ni, P, Pd, Co and W on the surface of the resin insulating layer and the opening part for a via-hole; (c) a process of forming a plating resist on said metal layer; (d) a process of forming an electroplating film on a part un-coated with said plating resist using an electroplating solution containing: 50 to 300 g/L of copper sulfate, 30 to 200 g/L of sulfuric acid, 25 to 90 mg/L of chlorine ion, and 1 to 1000 mg/L of an additive comprising at least a leveling agent and a brightener; and (e) a process of forming a conductor circuit by etching the metal layer existing under said plating resist after said plating resist is separated.