Patent ID: 6739048
Filing Date: 2004-05-25
Classification: H01L,H05K,Y10T

Abstract:
A process of fabricating a circuitized structure comprising the steps of:(a) applying a dielectric film to at least one surface of an organic substrate, said organic substrate having circuit elements formed on a top surface of said organic substrate and filled plated through holes formed entirely though said organic substrate; (b) forming microvias in selective portions of said dielectric film so as to expose said circuit elements and portions of said filled plated through holes; (c) sputtering a metal seed layer on said dielectric film and in said microvias, said metal seed layer is in contact with at least said circuit elements and said portions of said filled plated through holes; (d) plating a metallic layer on said metal seed layer; and (e) etching said metallic layer and said metal seed layer to form outer circuitry on said dielectric film, wherein a predetermined number of said outer circuitry is in contact with said circuit elements and said portions of said filled plated through holes.