Patent ID: 8227324
Filing Date: 2012-07-24
Classification: C30B,H01L

Abstract:
1. A method for producing a semiconductor crystal in which a Group III nitride-based compound semiconductor crystal is grown by reacting nitrogen (N) with a Group III element of gallium (Ga), aluminum (Al), or indium (In) in a flux mixture containing an alkali metal, the method comprising: employing a sapphire substrate having a back surface that is not a uniform C-plane as a base substrate on which a Group III nitride-based compound semiconductor crystal is grown; and corroding, removing, melting, or dissolving at least a part of the sapphire substrate in the flux mixture during crystal growth of the Group III nitride-based compound semiconductor or after crystal growth of the Group III nitride-based compound semiconductor at a temperature in the vicinity of crystal growth temperature.