Patent ID: 7098136

Claim:
A method of fabricating a structure having multiple layers of embedded substantially flush/coplanar circuitry features, the method comprising: providing a stiffening dielectric layer; providing first and second structures having embedded, substantially flush, coplanar circuitry features, wherein each said structure is provided by a method comprising: providing a carrier foil having a bottom side and an electrically conductive blanket layer on a top side, coating the electrically conductive layer with a dielectric material, forming circuitry features in said dielectric material, plating conductive metal to fill said circuitry features, planarizing said conductive metal to provide a planar surface having features of conductive metal surrounded by dielectric material, and plating a conductive finish metal layer onto said planar surface; and laminating a circuitry side of said first structure to a first side of said stiffening dielectric and laminating a circuitry side of said second structure to a second side of said stiffening dielectric layer.