Patent ID: 7183654

Claim:
A die, comprising: a dielectric layer positioned on top of a semiconductor support layer; a via passing through the dielectric layer and the semiconductor support layer, wherein a first end of the via is positioned in the dielectric layer and a second end of the via is positioned in the semiconductor support layer, wherein a first diameter of the first end is greater than a second diameter of the second end, wherein the second end of the via includes a shaft in the semiconductor support layer, the shaft including a shaft diameter similar to the second diameter, wherein the shaft tapers outward from a center of the via within the semiconductor support layer towards the dielectric layer to form a semi-cone shape in the semiconductor support layer, wherein the semi-cone shape forms an increased via contact area at the first end for coupling the via to a contact; and the contact positioned on top of the dielectric layer, the contact coupled to the first end of the via.