Patent ID: 6809351
Filing Date: 2004-10-26
Classification: C30B,H01L

Abstract:
A semiconductor layered structure comprising:a base material having a crystal structure; a mask over said base material, and said mask having at least one opening defined by side walls, and said at least one opening further defining at least a growth area of a surface of said base material; and a Group III-V compound semiconductor epitaxial layer being directly on said at least growth area and said Group III-V compound semiconductor epitaxial layer completely burying said mask, wherein said Group III-V compound semiconductor epitaxial layer includes dislocations which extend substantially parallel to a thickness direction of said Group III-V compound semiconductor epitaxial layer, and at a facet face of a facet structure of said Group III-V compound semiconductor epitaxial layer, said dislocations turn substantially perpendicular to said thickness direction and are terminated by said side walls of said mask.