Patent ID: 6063186
Filing Date: 2000-05-16
Classification: C23C,C30B,Y10S

Abstract:
A method of forming epitaxial layers of silicon carbide on an appropriate substrate by chemical vapor deposition, the method comprising:blending silicon carbide source gases are with a first carrier gas; directing the source gases into a reactor that contains a substrate over which the carrier and source gases flow over the substrates in an upstream to downstream orientation parallel to the epitaxial growth surface of the substrate;heating the reactor to a temperature at which the source gases will react to form an epitaxial layer of silicon carbide on the substrates in the reactor; and whileblending a second carrier gas with the first carrier gas, and in which the second carrier gas has a thermal conductivity that is less than the thermal conductivity of the first carrier gas, and wherein the second carrier gas is present in an amount that moderates the temperature sufficiently to reduce or eliminate source gas depletion during the growth of an epitaxial layers of silicon carbide on the substrate, but less than an amount that would reduce the temperature sufficiently to prevent the source gases from reacting to form the epitaxial layer.