Patent ID: 7094701

Claim:
A method of manufacturing a semiconductor device, comprising: providing a semiconductor substrate comprising a first insulation film formed on a top surface thereof and a pad electrode formed on the first insulation film; forming from a bottom surface of the semiconductor substrate a via hole penetrating through the semiconductor substrate to expose part of the first insulation film that covers the pad electrode; removing the exposed part of the first insulation film; forming a second insulation film on the bottom surface of the semiconductor substrate and inside the via hole; forming a third insulation film on the second insulation film so that the third insulation film comprises an overhung portion extending from a rim of the via hole toward an inside of the via hole; etching the second insulation film using the third insulation film as a mask to expose the pad electrode at a bottom of the via hole; forming in the via hole a through-hole electrode that is electrically connected with the pad electrode; and cutting the semiconductor substrate to produce a semiconductor die.