Patent ID: 6943095

Claim:
A method of forming a (Ga, Al, In)N material, comprising carrying out the growth of said (Ga, Al, In)N material on a substrate by an HVPE epitaxial growth process, under low surface mobility growth conditions wherein one of the low surface mobility growth conditions is characterized by a growth pressure in the range from 10 torr to 1000 torr and for sufficient time to form a low defect density, substantially crack-free (Ga, Al, In)N material having a surface area of at least 1 cm 2 and a defect density of 10 7 defects/cm 2 or lower, wherein the defects comprise threading dislocations having a tilt angle substantially greater than 0.1 degree and the HVPE epitaxial growth process is carried out to grow said low defect density, large area, substantially crack-free (Ga, Al, In)N material to a thickness of at least 10 μm.