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

摘要

provides a useful high purity and uniform hexagonal single crystals as substrates for Ur difference teuhyeong various devices . ; AX obtained by crystal growth on at least m-plane from a columnar seed crystal of a single crystal of the hexagonal compound teuhyeong Ur difference represented by ( the A -positive elements , X is negative elements) , other than the positive element A and also variations in the concentration of the metal in concentration of 0.1 ~ 50ppm characterized in that it is less than 100%.