Patent ID: 7998793

Claim:
A method of manufacturing a semiconductor device, the method comprising: (a) a step of placing a silicon wafer, on which a wafer process has been completed, on a dicing stage in a dicing process unit covered with a semi-transparent cover or a light-shielding cover in a dicing device; and (b) a step of performing a two-step cutting process to cut a scribe area from a first main surface of the silicon wafer by first and second dicing blades held so that side surfaces thereof are opposed to each other while supplying water, or a chemical solution containing water as a main component, to the first main surface of the silicon wafer on which a semiconductor device having electrodes containing aluminum as a main component is formed, wherein the step (b) is performed in a state where light is irradiated at any position on the first main surface of the silicon wafer from an illumination device provided in the dicing device, and the light irradiated from the illumination device has an energy equal to or larger than a bandgap of silicon.