Patent ID: 6573164
Filing Date: 2003-06-03
Classification: C23C,C30B,H01L

Abstract:
A method of fabricating a Group III nitride semiconductor device in a single epitaxial growth run, the method utilizing HVPE techniques and comprising the steps of:locating a first Group III metal in a first source zone of an HVPE reactor; locating a second Group III metal in a second source zone of said HVPE reactor; locating a substrate within a growth zone of said HVPE reactor, wherein said growth zone is maintained at a first temperature; heating said first Group III metal to a second temperature; heating said second Group III metal to a third temperature; introducing a halide reaction gas into said first source zone to form a first Group III metal halide compound; transporting said first Group III metal halide compound to said growth zone; transporting a reaction gas into said growth zone, said reaction gas containing nitrogen (N); growing a first layer comprised of said first Group III metal and nitrogen, said first layer formed by said reaction gas reacting with said first Group III metal halide compound; transferring said substrate to a growth interruption zone maintained at a fourth temperature, wherein said fourth temperature is within 50Â° C. of said first temperature; directing an inert gas in a flow direction that substantially prevents said first Group III metal halide compound and said reaction gas from entering said growth interruption zone; purging said growth zone; introducing said halide reaction gas into said first source zone to form said first Group III metal halide compound; introducing said halide reaction gas into said second source zone to form a second Group III metal halide compound; transporting said first Group III metal halide compound and said second Group III metal halide compound to said growth zone; transporting said reaction gas into said growth zone; transferring said substrate from said growth interruption zone to said growth zone; growing a second layer comprised of said first Group III metal, said second Group III metal and nitrogen, said second layer formed by said reaction gas reacting with said first Group III metal halide compound and said second Group III metal halide compound; and discontinuing said steps of transporting said first Group III metal halide compound, said second Group III metal halide compound and said reaction gas to said growth zone.