Kompositmaterial.

摘要

A composite material useful as a diode capable of operating at a high temperature, i.e., 500 to 600 DEG C or a semiconductor optical device capable of emitting ultraviolet rays is provided which comprises single crystal diamond having electric insulation and single crystal cubic boron nitride formed on one surface of the single crystal diamond as a substrate in such a manner that the single crystal cubic boron nitride has the same plane index on the substrate.