Patent ID: 8293012
Filing Date: 2012-10-23
Classification: C30B,Y10T

Abstract:
1. A method of growing an Al x Ga 1-x N crystal (0<x≦1) by sublimation onto an undersubstrate under a controlled ambient in a reaction vessel, the Al x Ga 1-x N crystal growth method comprising: setting up in the reaction vessel a crystal-growth ambient containing suitable Al heating the undersubstrate to a temperature of from 1600° C. to less than 2000° C.; introducing into the ambient at least one Group-IVb element in gaseous form, together with the carrier gas, at a flow rate of 0.005 sccm to 250 sccm, or in solid form together with the Al controlling the crystal-growth temperature, the concentration of the ambient impurities, and the predetermined time period during which the impurities are introduced into the ambient so as to grow the Al