Patent ID: 6208001
Filing Date: 2001-03-27
Classification: H01L

Abstract:
A coated substrate comprising:(a) a single crystal gallium arsenide substrate having a substrate surface, and(b) an insulator covering at least a portion of the gallium arsenide substrate surface, where said insulator includes a homogenous film comprising a monolayer of Group IIa metal atoms attached directly onto said gallium arsenide substrate surface, and a single crystal epitaxial film comprised of a Group IIa metal fluoride on said monolayer, where the substrate and single crystal epitaxial film have the same crystal orientation, andwherein the homogenous film is formed as the reaction product of a reaction between a Group IIa metal fluoride vapor and the gallium arsenide substrate surface in the presence of arsenic gas at said gallium arsenide substrate surface whereby two-dimensional growth of the single crystal epitaxial film results on said monolayer.