Patent ID: 8679882

Claim:
A method of manufacturing a semiconductor device, the method sequentially comprising: a semiconductor device structure formation process in which a semiconductor device structure is partially or wholly formed at least in a main surface side of a first conduction type silicon carbide bulk substrate having a main surface and a rear surface; and an ohmic electrode formation process in which an ohmic electrode making ohmic contact with the silicon carbide bulk substrate is formed in the rear surface side of the silicon carbide bulk substrate, wherein the ohmic electrode formation process sequentially includes a sub-process of thinning the silicon carbide bulk substrate by polishing the rear surface side of the silicon carbide bulk substrate and then forming the ohmic electrode in the rear surface; and a sub-process of performing heat treatment using an optical heating method in which high-power light is irradiated from the rear surface side of the silicon carbide bulk substrate to the ohmic electrode, wherein the sub-process of performing heat treatment of the ohmic electrode formation process is carried out by lowering a temperature of the main surface side to be less than a temperature of the rear surface side by cooling at least the main surface side of the silicon carbide bulk substrate.