Patent ID: 6194785
Filing Date: 2001-02-27
Classification: B32B,C23C,H01L,H05K,Y10S,Y10T

Abstract:
An electronic circuit package comprising:a substrate;one or more drilled through-holes or other openings in the substrate;metallization of at least one of the one or more drilled through-holes or other openings by the steps of:forming a layer of solution on a surface of the drilled substrate, the solution having a composition which includes(i) a first metal-containing compound with the general chemical formula ML.sub.m X.sub.n, where M denotes a metal cation, L is a Lewis base ligand and X denotes an anion, and m and n denote integers; and(ii) a photoreactive oxalate compound with the general chemical formula Y.sub.p M((C.sub.2 O.sub.4)3).sub.p and p denotes an integer;exposing selected regions of the layer to light, whereby the exposed form of the oxalate compound acts as a reducing agent to thereby form the first metal on regions of the drilled substrate corresponding to the selected regions of the layer; andremoving unexposed regions of the layer from the drilled substrate while depositing essentially no metal onto either the first metal or the unexposed regions ofone or more wires passing through at least one of the one or more drilled through-holes or other openings.