Patent ID: 7141444
Filing Date: 2006-11-28
Classification: H01L

Abstract:
1. A method for fabricating a Group III nitride compound semiconductor through epitaxial growth thereof on a main plane of a substrate, which comprises: etching a base layer which comprises at least one layer of a Group III nitride compound semiconductor, an uppermost layer of the base layer comprising a first Group III nitride compound semiconductor, to thereby form an island-like structure having at least one of a dot-like structure, a stripe-shaped structure, and a grid-like structure, so as to provide a trench and a mesa such that a plane of a different layer, from first Group III nitride compound semiconductor, parallel to said main plane of said substrate, the different layer being formed of a third Group III nitride compound semiconductor having a composition different from that of the first Group III nitride compound semiconductor, is exposed at a bottom portion of the trench; and epitaxially growing, vertically and laterally, above said base layer, a second Group III nitride compound semiconductor, with a top surface of the mesa and at least one sidewall of the trench each serving as a nucleus, the mesa and the trench being formed by etching the first Group III nitride compound semiconductor so as to form an island-like structure having at least one of a dot-like structure, a stripe-shaped structure, and a grid-like structure.