Patent ID: 6591495
Filing Date: 2003-07-15
Classification: B23K,H01L,H05K,Y10T

Abstract:
A method of manufacturing a multilayered printed circuit board comprising at least the steps (1) to (5):(1) pressing resin to form an interlayer insulating resin layer having a metal film formed thereon against a substrate for forming a conductor circuit; (2) reducing the thickness of a whole surface of the metal film by performing etching; (3) forming an opening in the metal film so as to expose the interlayer insulating resin layer; (4) applying a laser beam at the formed opening of the metal film to remove the resin forming the interlayer insulating resin layer exposed through the opening so as to provide an opening for a via hole; and (5) depositing a plating conductor in the opening for forming the via hole so as to form the via hole.