Patent ID: 6620650
Filing Date: 2003-09-16
Classification: H01L,H05K

Abstract:
A method for manufacturing a plastic package, wherein using a resin substrate having a Cu foil on one side or both sides joined, an interconnection pattern, outside terminal connection pads, and semiconductor device connection pads are arranged on one side or both sides of the resin substrate, comprising the steps of:removing the Cu foil formed on the surface of the resin substrate by etching; forming an electroless Cu plating film on the surface of the resin substrate; forming a plating resist pattern inverse to an interconnection pattern on the surface of the electroless Cu plating film; applying an electric current to the electroless Cu plating film so as to form an electrolytic Cu plating film on the surface of th electroless Cu plating film which is not covered with the plating resist pattern; applying an electric current to the electroless Cu plating film so as to form Ni and Au plating films by electroplating on the surface of the electrolytic Cu plating film which is not covered with the plating resist pattern and form an interconnection pattern portion, the outside terminal connection pads and the semiconductor device connection pads; and removing the plating resist pattern so as to remove the electroless Cu plating film which is not covered with the Ni and Au plating films and the electrolytic Cu plating film by etching.