Patent ID: 6146458
Filing Date: 2000-11-14
Classification: C30B,Y10T

Abstract:
A method of growing a layer of Group III nitride material on a substrate by molecular beam epitaxy, comprising the steps of:(i) disposing a substrate in a vacuum chamber;(ii) reducing the pressure in the vacuum chamber to a pressure suitable for epitaxial growth by molecular beam epitaxy;(iii) supplying ammonia through an outlet of a first supply conduit into the vacuum chamber so that the ammonia flows towards the substrate; and(iv) supplying a Group III element in elemental form through an outlet of a second supply conduit into the vacuum chamber so that said Group III element flows towards the substrate, whereby to cause a layer containing a Group III nitride to be grown on the substrate by molecular beam epitaxy;wherein the outlet of the first supply conduit is disposed nearer to the substrate than the outlet of the second supply conduit.