Patent ID: 9076859
Filing Date: 2015-07-07
Classification: H01J,H01L

Abstract:
1. A method of manufacturing semiconductor chips by dividing a semiconductor wafer into the semiconductor chips, the semiconductor wafer having a first surface on which a plurality of semiconductor element sections defined by a dividing region are formed on an insulating film and a second surface opposed to the first surface, said method comprising: forming on the first surface a mask that covers the semiconductor element sections but exposes the dividing region; removing the insulating film in the exposed dividing region from the mask by applying plasma irradiation to the first surface; removing an affected layer produced on surfaces of the mask due to the plasma irradiation for removing the insulating film by applying plasma irradiation to the first surface; attaching a protection tape on the first surface after said removing of the affected layer; thinning the semiconductor wafer by grinding the second surface after said attaching of the protection tape; attaching a holding tape with a frame on the second surface after said grinding of the second surface; peeling and removing the protection tape from the first surface after said attaching of the holding tape; removing the semiconductor wafer in the dividing region exposed from the mask by applying plasma irradiation to the first surface after said peeling and removing of the protection tape so as to divide the semiconductor wafer into the semiconductor chips each including one of the semiconductor element sections; and removing the mask after the semiconductor wafer is divided into the semiconductor chips by said applying of the plasma irradiation to the first surface.