PROCESS FOR PRODUCING NITRIDE SEMICONDUCTOR, CRYSTAL GROWTH RATE ENHANCEMENT AGENT, NITRIDE SINGLE CRYSTAL, WAFER AND DEVICE

摘要

This invention provides a process for producing a nitride semiconductor, comprising the step of regulating the temperature and pressure within an autoclave containing a seed having a crystal structure of a hexagonal system, a nitrogen element-containing solvent, a starting material comprising a metallic element belonging to group 13 of the periodic table, and a mineralizer so that the solvent is brought to a supercritical state and/or a subcritical state to allow a nitride semiconductor crystal to grow ammonothermally on the surface of the seed, wherein the crystal growth rate in m-axis direction on the seed is brought to not less than 1.5 times the crystal growth rate in c-axis direction on the seed. The above constitution can realize the production of nitride semiconductors with a large-diameter c face and nitride semiconductors having a large thickness in m-axis direction in an efficient and simple manner.