Patent ID: 7637008

Claim:
A method comprising: forming a substrate to mount an electronic component, the substrate comprising a core layer and at least one additional insulating layer, wherein the substrate comprises a plurality of conductive lands on a first surface to mount the electronic component, and wherein the substrate comprises a plurality of conductive pads on a second surface; imprinting a plurality of conductor features simultaneously in the substrate, wherein the conductor features comprise a plurality of through vias to provide a plurality of conductive paths between and through the core layer and the at least one additional insulating layer, wherein the conductor features further comprise a plurality of trenches, wherein at least one of the through vias is formed within at least one trench, and wherein at least one of the through vias goes entirely through the core layer and the at least one additional insulating layer and connects one of the conductive lands to one of the conductive pads; wherein imprinting comprises imprinting simultaneously the plurality of trenches in the at least one additional insulating layer and the plurality of through vias in both the core layer and in the at least one additional insulating layer; wherein the through vias include a first through via having an upper portion formed by imprinting the upper portion from a first side of the substrate with a first imprinting tool of circular cross-section extending into the substrate to a depth; wherein the first through via further comprises a lower portion formed by imprinting the lower portion from a second side of the substrate with a second imprinting tool of circular cross-section extending into the substrate to meet the first die at the depth; and wherein the depth is midway between the first and second sides; and filling the imprinted conductor features with an electrically conductive material.