Patent ID: 8716121
Filing Date: 2014-05-06
Classification: H01L

Abstract:
1. A method of forming an ohmic electrode for a p-type SiC semiconductor, comprising: subjecting a surface of a p-type semiconductor to a pre-sputter deposition treatment; and directly laminating, through sputter deposition, an ohmic electrode layer, which forms the ohmic electrode, which is made of a Ti(1−x−y)Si(x)C(y) ternary film of which a composition ratio is on a line or curve, or is within a composition range that is surrounded by two lines and two curves, expressed by an expression x=0 (0.35≦y≦0.5), an expression y=−1.120x+0.5200 (0.1667≦x≦0.375), an expression y=1.778(x−0.375) a temperature in a sputtering chamber during the sputter deposition is adjusted to a temperature at which crystallization of the electrode layer does not occur; and a thermal treatment at a temperature at which crystallization of the electrode layer occurs is prohibited after the sputter deposition.