Patent ID: 8263491

Claim:
A method for producing a substrate with at least one feedthrough, the method comprising: providing a substrate having at least one channel from a first main surface of the substrate to a second main surface of the substrate; forming a first insulation layer of tetraethyl orthosilicate to cover the first main surface and the second main surface of the substrate, and an inner surface of the at least one channel; applying a barrier layer of at least one of TiN and TaN to the first inulation layer; applying a metal layer to entirely cover only the first main surface of the substrate and partially cover only a portion of the inner surface of the at least one channel adjacent to the first main surface of the substrate; closing off the at least one channel with an electrically conductive first material; and filling the closed-off at least one channel with an electrically conductive second material, wherein only a portion of the electrically conductive second material adjacent to the first main surface of the substrate is in direct contact with a vertical portion of the metal layer, and wherein only the first main surface of the substrate is entirely covered by a horizontal portion of the metal layer.