Patent ID: 6893945

Claim:
A method for manufacturing a group III nitride compound semiconductor, comprising: growing a first group III nitride compound semiconductor Al x 1Ga y 1In 1−x1−y1 N (0≦x1≦1 , 0≦y1≦1, 0≦x1+y1≦1) on a substrate into an island pattern including any of a dot pattern, a striped pattern, or a grid pattern such that substrate-exposed portions are formed in a scattered manner; and growing a second group III nitride compound semiconductor Al x2 Ga y2 In 1−x2−y2 N (0≦x2 ≦1, 0≦y2 ≦1, 0≦x2+y2 ≦1) which causes epitaxial growth from an island or islands of said first group III nitride compound semiconductor serving as nuclei (seeds) so that said second group III nitride compound semiconductor keeps a gap to said substrate-exposed portions and connects adjacent ones of said first group III nitride compound semiconductor.