Patent ID: 7794541

Claim:
A method for producing a gallium nitride-based material, comprising: locating a support configured to support an underlying substrate in a reaction chamber of a production apparatus; placing the underlying substrate on the support; supplying a carrier gas comprising H 2 gas, GaCl gas, and NH 3 gas to the reaction chamber; and growing the gallium nitride-based material by Hydride Vapor Phase Epitaxial Growth (HVPE) on the underlying substrate; wherein a growth temperature is from 900° C. to 1,200° C., a growth pressure is from 8.08×10 4 Pa to 1.21×10 5 Pa, a partial pressure of the GaCl gas in the supply gas is from 1.0×10 2 Pa to 1.0×10 4 Pa, a partial pressure of the NH 3 gas in the supply gas is from 9.1×10 2 Pa to 2.0×10 4 Pa, and wherein the production apparatus consists of a supply chamber in communication with the reaction chamber, the supply chamber supplies the carrier gas, the GaCl gas, and the NH 3 gas to the reaction chamber, and an average sectional area of the supply chamber is smaller than an average sectional area of the reaction chamber.