Patent ID: 7992295

Claim:
A method for making an electrically conductive connection between two electrically conductive tracks present on two opposite sides of a dielectric substrate, comprising: providing the substrate, with at least one first track present on one side thereof and at least one second track present on the other side of the substrate opposite said one side, the first and second tracks being electrically conductive tracks; forming a through hole through the substrate and through the first track and the second track; and making an electrically conductive connection via said through hole between the first track through which the through hole has been formed and the second track through which the through hole has been formed, wherein the electrically conductive connection extends along a wall of the through hole, the providing step includes unwinding the substrate from a roll, the making step includes conveying the unwound part of the substrate through an electrolytic bath, and the forming step includes forming the through hole in the substrate at a position between the roll and the electrolytic bath.