Patent ID: 6818926
Filing Date: 2004-11-16
Classification: C30B,H01L

Abstract:
A group III nitride compound semiconductor comprising:a substrate; a buffer layer formed on said substrate into an island pattern comprising any of a dot pattern, a striped pattern, and a grid pattern such that substrate-exposed portions are formed in a scattered manner; a first group III nitride compound semiconductor layer A1x1Gay1In1âˆ’1âˆ’y1N (0&lE;x1&lE;1, 0&lE;y1&lE;1, 0&lE;x1+y1&lE;1) formed on said buffer layer; and a second group III nitride compound semiconductor layer Alx2Gay2In1âˆ’x2âˆ’y2N (0&lE;x2&lE;1, 0&lE;y2&lE;1, 0&lE;x2+y2&lE;1) which causes epitaxial growth from an island or islands of said first group III nitride compound semiconductor layer serving as nuclei (seeds) so that said second group III nitride compound semiconductor layer has no chemical binding to said substrate-exposed portions and connects adjacent ones of said first group III nitride compound semiconductor layer.