Patent ID: 7081402

Claim:
A fabrication method for a semiconductor package substrate having a contact pad protective layer formed thereon, the method comprising the steps of: providing an insulating layer having a plurality of blind vias formed therein for exposing inner traces disposed underneath the insulating layer; forming a conductive film on the insulating layer and over the blind vias; forming a first resist layer on the conductive film, wherein the first resist layer has a plurality of openings to expose predetermined parts of the conductive film; performing a first electroplating process to form a patterned trace layer in the openings and form conductive vias in the blind vias, wherein the patterned trace layer comprises a plurality of contact pads, and at least one of the contact pads is electrically connected to at least one of the conductive vias; forming a second resist layer over the patterned trace layer exclusive of the contact pads, making the contact pads exposed from the second resist layer; performing a second electroplating process to form a metal barrier layer on the contact pads; and after forming the metal barrier, removing the second resist layer, the first resist layer, and parts of the conductive film covered by the first resist layer.