Patent ID: 8278213

Claim:
A method of manufacturing a semiconductor device, comprising: providing a semiconductor substrate comprising a first insulation film formed on a front surface thereof and a pad electrode formed on a first surface of the first insulation film; bonding a supporting member to the front surface of the semiconductor substrate by a resin; forming a via hole penetrating the semiconductor substrate from a back surface thereof to expose a second surface of the first insulation film; forming a groove extending along a dicing line and penetrating the semiconductor substrate from the back surface of the semiconductor substrate to expose the second surface of the first insulation film; forming a wiring layer in the via hole and the groove of the semiconductor substrate having the groove and bonded to the supporting member so that the wiring layer is disposed on the back surface of the semiconductor substrate and connected to the pad electrode through the via hole, the wiring layer being continuous from the groove to the via hole, and dicing the supporting member through the groove so as to produce a semiconductor device, wherein the via hole and the groove are formed by etching at the same time.