Patent ID: 8048801

Claim:
A method of manufacturing a substrate, the method comprising: forming at least one channel extending from a first main surface to a second main surface of a substrate, the at least one channel comprising a first cross-sectional area disposed at a first location and a second cross-sectional area disposed at a second location, wherein the first cross-sectional area is larger than the second cross-sectional area; and arranging an electrically conductive first material in the at least one channel by dipping the substrate in a first melt of electrically conductive first material and applying a pressure to the first melt such that the at least one channel is filled with the first melt at the first location but is free of the first melt at the second location, wherein the at least one channel has a first opening at the first main surface of the substrate and a second opening at the second main surface of the substrate, and wherein the first opening and the second opening are exposed to the first melt of electrically conductive first material when the substrate is dipped in the first melt.