Patent ID: 8541304

Claim:
A method for producing an interconnection structure with at least one via passing through a substrate, the method comprising: simultaneously forming, in a front face of the substrate, at least one first opening producing a closed contour and at least one second opening situated inside the closed contour, wherein the second opening does not pass through the substrate and the second opening includes a wall and a bottom, the first opening and the second opening being separated by a zone of the substrate; filling the first and second openings with a first material; removing the first material from one of the first and second openings from the front face; forming or depositing a second material in the one of the first and second openings from which the first material is removed; and after forming or depositing the second material, revealing the second opening from a back face of the substrate to form one interconnection via, wherein each of the first material and the second material comprises one of a dielectric material and a conducting material, and wherein the first material is different from the second material.