Patent ID: 7750478
Filing Date: 2010-07-06
Classification: H01L

Abstract:
1. A semiconductor device comprising: a monolithic silicon substrate comprising a front surface and a back surface and having a via hole connecting the front and back surfaces; a pad electrode disposed on the front surface to cover the via hole; a first insulation layer disposed between the pad electrode and the front surface of the substrate; a supporting member disposed on the front surface to cover the pad electrode and the first insulation layer; a second insulation layer disposed on a sidewall of the via hole; and a metal layer disposed in the via hole and on the second insulation layer, wherein the via hole comprises a first via hole portion extending from the front surface and a second via hole portion extending from the back surface, and a sidewall of the first via hole portion recedes from a point where the first and second insulation layers and the substrate meet so as to form a semicircular recess in the sidewall of the first via hole portion in a cross-sectional view of the semiconductor device.