Patent ID: 7413931

Claim:
A method of manufacturing a semiconductor device, comprising: providing a semiconductor substrate comprising a front surface, a back surface, a first insulation film disposed on the front surface and a pad electrode disposed on the first insulation film; attaching a support body to the front surface; forming an opening in the semiconductor substrate and adjacent the pad electrode by etching the semiconductor substrate from the back surface, the opening having a bottom and a sidewall; forming a second insulation film that is disposed on the back surface and extends into the opening; etching the first and second insulation films disposed at the bottom of the opening to expose part of the pad electrode; forming an organic protection layer that is disposed on the back surface and extends into the opening so as to cover a portion of the second insulation film corresponding to a boundary between the sidewall and the bottom of the opening; and forming a wiring layer that is disposed on the back surface and extends into the opening so as to be in contact with the exposed pad electrode, part of the wiring layer being disposed on the organic protection layer.