Patent ID: 9263258
Filing Date: 2016-02-16
CPC Classification: C30B,H01L

Claim Text:
1. A method for producing a Group III nitride-based semiconductor, said method comprising: providing a main surface of a sapphire substrate, wherein an angle between the main surface and an R-plane (1-102) of a sapphire is 30° and a line of intersection formed by the R-plane (1-102) and an A-plane (11-20) of the sapphire exists on the main surface, the A-plane (11-20) being perpendicular to the R-plane (1-102), and a direction of the line being a [−1101] direction of the sapphire; forming a groove on the main surface, which comprises a stripe-form extending along the line and an exposed side surface which comprises the R-plane (1-102); and epitaxially growing a Group III nitride-based compound semiconductor of interest primarily on the exposed side surface of the R-plane (11-20) by a mediation of a buffer layer, so that the Group III nitride-based compound semiconductor comprises an A-plane surface parallel to the exposed side surface of the groove, to thereby form a Group III nitride-based compound semiconductor layer comprising an M-plane (1-100) main surface parallel to the main surface of the sapphire substrate.