Patent ID: 7959729

Claim:
A method for producing Group-III-element nitride single crystals comprising: heating a reaction vessel containing a seed substrate for forming the Group-III-element nitride, a flux that comprises at least one metal element selected from the group consisting of an alkali metal and an alkaline-earth metal, and at least one Group III element selected from the group consisting of gallium (Ga), aluminum (Al), and indium (In); dissolving a nitrogen-containing gas in the flux of the at least one metal element in which the at least one Group III element is dissolved so as to produce and grow the Group-III-element nitride single crystals on the seed substrate; and providing a continuous flow of the flux dissolving nitrogen-containing gas across a surface of the substrate in a thin layer state so as to allow the nitrogen-containing gas to dissolve in the flux and supply nitrogen continuously to growth faces of the crystals, wherein the Group-III-element nitride is produced and grown on the seed substrate with the flux containing nitrogen that is supplied from a high-pressure nitrogen-containing gas in a range of pressure from 100 pa to 20 Mpa, and the continuous flow of the flux dissolving nitrogen-containing gas across a surface of the substrate in a thin layer state is provided by rocking the reaction vessel in a manner that the reaction vessel is tilted in at least one direction.