Patent ID: 7300857
Filing Date: 2007-11-27
Classification: H01L

Abstract:
1. A method for forming an interconnect, comprising forming an electrically conductive interconnect through a wafer, wherein the interconnect extends from a frontside surface of the wafer to a backside surface of the wafer, and wherein forming the electrically conductive interconnect further comprises: forming a hole through a bond pad in the wafer, the hole extending from the frontside surface of the wafer to the backside surface of the wafer; coating sidewalls of the hole with a dielectric; applying a first conductive material to the dielectric; filling the hole with a second conductive material, the second conductive material extending from the frontside surface to the backside surface and being electrically coupled to the bond pad, wherein the second conductive material is co-planar and/or recessed with respect to the frontside surface and surrounded by a dielectric passivation material at the frontside surface; and performing a chemical mechanical polish on the passivation material after filling the hole with the second conductive material.