HEXAGONAL WURTZITE TYPE SINGLE CRYSTAL, PROCESS FOR PRODUCING THE SAME, AND HEXAGONAL WURTZITE TYPE SINGLE CRYSTAL SUBSTRATE

摘要

A highly purified homogeneous hexagonal wurtzite type single crystal that is useful as substrates for various devices. There is provided a hexagonal wurtzite type compound single crystal represented by AX (A is a positive element while X is a negative element) obtained by crystal growth on at least m-plane from a columnar seed crystal, characterized in that the concentration dispersion of metal other than the positive element A whose concentration is in the range of 0.1 to 50 ppm is within 100%.