Patent ID: 6890809

Claim:
A method of fabricating a p-n heterojunction device utilizing HVPE techniques and comprising the steps of: locating a Ga metal in a first source zone of a reaction chamber; locating an Al metal in a second source zone of said reaction chamber; locating at least one acceptor impurity metal in a third source zone of said reaction chamber; locating a Si source in a fourth source zone of said reaction chamber; locating a Zn source in a fifth source zone of said reaction chamber; locating a substrate within a growth zone of said reaction chamber; heating said substrate to a first temperature, wherein said first temperature is greater than 900°C.; heating said Ga metal to a second temperature, wherein said second temperature is in the range of 750° C. to 1050° C.; heating said Al metal to a third temperature, wherein said third temperature is in the range of 700° C. to 850° C.; heating said at least one acceptor impurity metal to a fourth temperature, wherein said fourth temperature is in the range of 250° C. to 1050° C.; introducing a halide reaction gas into said first source zone to form a gallium chloride compound; introducing said halide reaction gas into said second source zone to form an aluminum trichloride compound; transporting said gallium chloride compound to said growth zone; transporting said Si to said growth zone; transporting said Zn to said growth zone; introducing a reaction gas into said growth zone, said reaction gas containing nitrogen; growing an n-type GaN layer on said substrate, said n-type GaN layer formed by said reaction gas reacting with said gallium chloride compound, wherein said n-type GaN layer is co-doped with said Si and said Zn; transporting said aluminum trichioride compound to said growth zone; transporting said at least one acceptor impurity metal to said growth zone; and growing a p-type AlGaN layer on said n-type GaN layer, said p-type AlGaN layer formed by said reaction gas reacting with said gallium chloride compound and said aluminum trichioride compound, wherein said p-type AlGaN layer incorporates said at least one acceptor impurity metal.