Patent ID: 6482704
Filing Date: 2002-11-19
Classification: H01L

Abstract:
A method for manufacturing a silicon carbide semiconductor device, comprising:preparing a substrate having a semiconductor layer made of silicon carbide; and forming an oxide film on the semiconductor layer by a thermal oxidation treatment performed at conditions under which a first recrystallization reaction between silicon dioxide (SiO2) and carbon (C) occurs to produce silicon carbide (SiC) with a Gibbs free energy G3 being negative, the first recrystallization reaction being expressed by a chemical formula of: SiO2+3Câ†’SiC+2CO+G3, wherein the thermal oxidation treatment is performed at the conditions under which an oxygen mol ratio [O2] with respect to a standard state fulfils an equation of: 624.96Ã—103âˆ’354.23(T+273)+2R(T+273)ln[O2]&lE;0 in which T denotes a temperature Celsius, and R denotes a gas constant.