Patent ID: 6146457
Filing Date: 2000-11-14
Classification: C30B,H01L,Y10S

Abstract:
A method for fabricating a thick layer of semiconductor material, the method comprising:depositing an epitaxial layer of the semiconductor material on a substrate at a growth temperature using a chemical vapor deposition technique, wherein the epitaxial layer has a thickness on the order of a thickness of the substrate, wherein the substrate is a compound substrate comprising a thin interlayer deposited upon a foundational substrate composed of a material selected from the group consisting of silicon, sapphire, and silicon carbide, and wherein the epitaxial layer and the substrate are thermally mismatched; andcooling down the epitaxial layer and the substrate, wherein thermal mismatch between the epitaxial layer and the substrate causes during the cooling down defect generation in the substrate and not in the epitaxy;whereby a thick, high quality layer of semiconductor material is produced.