Patent ID: 6123768
Filing Date: 2000-09-26
Classification: C30B,H01L,Y10S

Abstract:
A method of preparing insulating monocrystalline Group III-nitride films comprising:providing in a molecular beam epitaxial growth chamber a single crystal substrate with the appropriate lattice match to the desired phase of the Group III-nitride film being grown;providing at least one molecular beam Group III source;providing an activated nitrogen source;opening the at least one molecular beam source; andexposing said substrate to said Group III and nitrogen sources to deposit a film at a low temperature;closing the at least one molecular beam source;raising the substrate temperature to above about 600.degree. C.;maintaining the substrate temperature at about 600.degree. C. to about 900.degree. C. in the presence of only the nitrogen source; andopening the at least one molecular beam source to grow a layer of the Group III-nitride on the film.