Patent ID: 6440823
Filing Date: 2002-08-27
Classification: B82Y,C30B,H01L

Abstract:
A method of forming a GaN material, comprising growing the GaN material by a HVPE growth process using NH3, HCl and Ga as reactants, wherein the HVPE growth process is carried out at a temperature in the range of from about 985Â° C. to about 1010Â° C., at a growth rate of from about 50 to about 150 &mgr;m per hour, a pressure of from about 10 to about 800 torr, and a NH3/HCl ratio of from about 20 to about 40, so that the formed GaN material includes dislocations that are predominantly angled with respect to the growth direction by a tilt angle that is in the range of 0.1 to about 40, and wherein the formed GaN material has a dislocation defect density of 107/ cm2 or lower.