Patent ID: 9054165
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate having an integrated circuit, a first surface, and a second surface opposite the first surface; a plurality of through-substrate interconnects electrically coupled to the integrated circuit, wherein individual interconnects have— a first end at least proximate to the first surface of the substrate; and a second end having a tip projecting from the second surface of the substrate such that the tip is spaced apart from the second surface of the substrate by an offset distance; and a dielectric layer at the second surface of the substrate, wherein the dielectric layer covers the second surface of the substrate and includes an outer surface, wherein each interconnect includes a sidewall surface that extends at least partially through the substrate and the dielectric layer, and wherein the interconnect further includes a contact surface that is below the outer surface of the dielectric layer and generally transverse to the sidewall surface, and spaced apart from the dielectric layer by a void between a portion of the sidewall surface and the dielectric layer, and further wherein the contact surface and the portion of the sidewall surface are both exposed.