Patent ID: 8404567

Claim:
A manufacturing method of a semiconductor device, comprising: forming grooves along plural chip areas from a first surface side at a semiconductor wafer having the first surface in which the plural chip areas are arranged and a second surface at an opposite side of the first surface; separating the plural chip areas into pieces by grinding the second surface of the semiconductor wafer after a protection sheet is attached to the first surface of the semiconductor wafer while maintaining a shape of the semiconductor wafer by the protection sheet; attaching a laminated film to the second surface of the semiconductor wafer held by the protection sheet, the laminated film including a supporting film, a dicing film, and an adhesive film, the supporting film being composed of a resin film with high modulus of elasticity, the dicing film and the adhesive film being sequentially laminated on the supporting film; and cutting the adhesive film from the first surface side of the semiconductor wafer along the chip areas after the protection sheet is removed from the semiconductor wafer so as not to cut completely through the supporting film and the dicing film.