Patent ID: 7906431
Filing Date: 2011-03-15
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, the semiconductor device including a semiconductor wafer including a semiconductor substrate, a semiconductor element formed over a top surface of the semiconductor substrate, an interlayer insulating film formed over the top surface of the semiconductor substrate, a pad formed over the interlayer insulating film and electrically connected to the semiconductor element, and a protective film covering upper portions of the interlayer insulating film and the pad, the method comprising: forming an annular goove extending from a bottom surface of the semiconductor substrate beneath the pad to the interlayer insulating film; forming an annular insulating layer in the annular groove and a bottom insulating film beneath the bottom surface of the semiconductor substrate by depositing an insulating material in the annular groove and on the bottom surface of the semiconductor substrate; forming an electrode-forming hole in a region circumscribed by the annular insulating layer, the electrode-forming hole extending from the bottom insulating film to the pad; forming a through-silicon via electrically connected to the pad by depositing a conductive material in the electrode-forming hole; and forming a lower terminal beneath the bottom insulating film and electrically connected to the through-silicon via.