Patent ID: 6562183
Filing Date: 2003-05-13
Classification: C23C,Y10T

Abstract:
An anticorrosion part for an etching apparatus for effecting etching treatment, said anticorrosive part comprising an anticorrosive part substrate, and a film of silicon carbide covering that surface of the anticorrosive part substrate which is to be exposed to an etching gas, wherein the silicon carbide film is made of polycrystals of silicon carbide having a 3C crystalline system, and (111) planes of the silicon carbide polycrystals are oriented in parallel to the surface of the silicon carbide film, wherein with respect to the entire volume of the silicon carbide polycrystals, the volume of crystalline particles of silicon carbide having grain sizes of 15 &mgr;m or more amounts to not more than 10 vol %, the volume of crystalline particles having grain sizes of 10 &mgr;m or more amounts to not more than 30 vol %, the volume of crystalline particles of silicon carbide having grain sizes of 2 &mgr;m or less amounts to not more than 10 vol %, and the volume of crystalline particles of silicon carbide having grain sizes of 3 &mgr;m or less amounts to not more than 30 vol %.