Patent ID: 8884440
Filing Date: 2014-11-11
Classification: H01L

Abstract:
1. An integrated circuit device comprising: a substrate through which a first through-hole extends; an interlayer insulating film on the substrate, the interlayer insulating film having a second through-hole communicating with the first through-hole; and a Through-Silicon Via (TSV) structure in the first through-hole and the second through-hole, the TSV structure extending to pass through the substrate and the interlayer insulating film, wherein the TSV structure comprises: an insulating liner on a sidewall of the first through-hole and the second through-hole; a first through-electrode portion on the insulating liner and having a top surface located in the first through-hole; and a second through-electrode portion on the insulating liner and having a bottom surface contacting with the top surface of the first through-electrode portion and extending from the bottom surface to at least the second through-hole; wherein the TSV structure further comprises a first barrier film extending on the insulating liner from the first through-hole to at least the second through-hole, wherein the first through-electrode portion has a first conductive plug having a side wall surrounded by the first barrier film and including a first metal, and wherein the second through-electrode portion has a second conductive plug having a side wall surrounded by the first barrier film and including a second metal.