Patent ID: 7456083

Claim:
A method of manufacturing a semiconductor device, comprising: providing a semiconductor wafer comprising a resin layer disposed on a front surface of the semiconductor wafer, a first electrode pad and a second electrode pad that are formed on the front surface, and a supporting member attached to the front surface by the resin layer, the semiconductor wafer comprising a plurality of semiconductor die regions; forming on a back surface of the semiconductor wafer a first alignment mark and a second alignment mark so that the first alignment mark is disposed in a first semiconductor die region and the second alignment mark is disposed in a second semiconductor die region that is next to the first semiconductor die region; detecting positions of the first and second alignment marks; calculating a middle position between the positions of the first and second alignment marks; aligning a blade with the calculated middle position on a side of the semiconductor wafer corresponding to the back surface; and cutting using the aligned blade at the calculated middle position the resin layer disposed on the front surface between the first and second electrode pads and along a predetermined direction.