Patent ID: 6451509
Filing Date: 2002-09-17
Classification: H05K

Abstract:
A method of forming a composite laminate structure comprising the steps of:providing first and second circuit board elements, each having city on at least one face thereof and plated through holes, providing a voltage plane element having at least one voltage plane having opposite faces with a layer of partially cured photopatternable dielectric material on each face thereof, photopatterning and etching at least one hole through said voltage plane element and at least one through each layer of photopatternable dielectric material terminating at said voltage plane, thereafter aligning each through hole and each opening in said voltage plane element with a plated through hole in at least one of said circuit board elements to provide surface on said voltage plane element communicating with said plated through holes and with said at least one face of each of said circuit board elements being oriented away from said voltage plane element, thereafter laminating said voltage plane element between said circuit board elements and fully curing said photopatternable dielectric material of said voltage plane element, and thereafter plating the surfaces on said voltage plane element communicating with said plated trough holes in said circuit board elements and said plated through holes in said circuit hoard elements.