Patent ID: 8153452

Claim:
A manufacturing method of a semiconductor device comprising the steps of: (a) forming a first metal film over a first main surface of a semiconductor wafer having a first thickness; (b) conducting, after the step (a), back grinding to a second main surface of the semiconductor wafer thereby making a second thickness thinner than the first thickness; (c) forming, after the step (b), an insulation film pattern comprising a first insulation film and containing an annular insulation film pattern along the periphery of a second main surface of the semiconductor wafer over the second main surface along the periphery thereof; (d) making the thickness for the opening of the annular insulation film pattern to a third thickness which is thinner than the second thickness in a state where the insulation film pattern is present; (e) forming, after the step (d), a second metal film over the second main surface of the semiconductor wafer in a state where the insulation film pattern is present; (f) bonding, after the step (e), the second main surface of the semiconductor wafer to an adhesive sheet thereby holding the semiconductor wafer to a dicing frame in a state where the insulation film pattern is present; and (g) dividing, after the step (f), the semiconductor wafer into individual chips in a state where it is held to the dicing frame.