Patent ID: 7060532

Claim:
A manufacturing method of a semiconductor device, comprising: providing a groove having a thickness equal to or larger than a finishing thickness on a first surface of a semiconductor wafer on which a semiconductor element is formed; affixing a pressure sensitive adhesive (PSA) tape onto the first surface of the semiconductor wafer in which the groove is formed; reducing the thickness of the semiconductor wafer by processing a second surface opposite to the first surface of the semiconductor wafer onto which the PSA tape is affixed, so as to separate the semiconductor wafer into a plurality of semiconductor chips on which the semiconductor element is formed; affixing an adhesive layer onto an entire rear surface of the separated semiconductor wafer; cutting the adhesive layer so as to separate the adhesive layer for each of the semiconductor chips; and peeling off the PSA tape from the semiconductor wafer while fixing the semiconductor wafer under suction by use of a porous member segmented into at least two sucking areas; wherein peeling off the PSA tape includes: fixing the semiconductor wafer onto the porous member by sucking the semiconductor wafer with at least two systems of suction paths in association with the sucking areas in the direction in which the PSA tape is peeled off; and when the PSA tape is peeled off along the peeling direction and part of the PSA tape is peeled off in one of the sucking areas adjacent to each other, switching the suction paths therebetween in the vicinity of the other adjacent sucking area which the peeling of the PSA tape approaches so as to suck the semiconductor wafer, thereby fixing the semiconductor wafer onto the porous member in the other sucking area, the adhesive layer is cut in parallel with a control for switch between the at least two or more systems of suction paths in response to the state in which the adhesive layer is cut.