Patent ID: 8008192

Claim:
A method for processing a substrate having a bond site at a first surface and a second surface opposite the first surface, comprising: forming a via in the substrate, the via having an opening proximate to the bond site of the substrate, a bottom portion in the substrate, and a sidewall between the opening and the bottom portion; contacting the sidewall of the via with a precursor of a conductive material in a supercritical fluid; depositing the conductive material on the sidewall of the via while the via is exposed to the precursor in the supercritical fluid, the conductive material being generally conformal to the sidewall of the via; forming a vent hole in the substrate with the conformal conductive material on the sidewall of the via, the vent hole extending from the bottom portion of the via to the second surface of the substrate; and filling the via with a fill material adjacent to the conformal conductive material after forming the vent hole.