Patent ID: 8888912

Claim:
A method of producing a group III nitride crystal in which a melt holding vessel where a melt containing a group III metal and flux is held is accommodated in a reaction vessel, a gas constituted by a substance containing nitrogen is supplied from outside the reaction vessel through a pipe, and a group III nitride crystal is produced as the gas constituted by the substance containing nitrogen is supplied from outside the reaction vessel, the method comprising: a step (a) of forming an accumulated part of a liquid in the pipe to thereby temporarily close the pipe, wherein the accumulated part of the liquid has at least two interfaces in contact with the gas, and the at least two interfaces are located in separate sections of the pipe and are substantially equal in height to each other; a step (b) of setting, out of the at least two interfaces, a temperature of one interface positioned closest to the melt holding vessel higher than a temperature of the other interface; and a step (c) of growing the group III nitride crystal in the melt holding vessel.