Patent ID: 7169313

Claim:
A method of forming a circuit pattern on a substrate, said method comprising: providing a dielectric substrate; forming a first conductive layer on said substrate; forming a plurality of holes within said dielectric substrate; forming a second conductive layer over said first conductive layer and onto the surfaces of said plurality of said holes within said dielectric substrate; forming a third conductive layer over said second conductive layer, said third conductive layer having a roughness greater than said first conductive layer; applying photo-resist material over said third conductive layer; exposing, developing and removing portions of said photo-resist material to define an initial circuit pattern within selected portions of said third conductive layer; forming a fourth conductive layer on said selected portions of said third conductive layer; performing a first removal step to remove a large portion of the remainder of said photo-resist material; performing a second removal step to remove substantially the remainder of said photo-resist material; and removing parts of said first, second and third conductive layers to define a final circuit pattern comprised of selected portions of said first, second, third and fourth conductive layers.