Patent ID: 9324913
Filing Date: 2016-04-26
CPC Classification: C30B,H01L,H01S

Claim Text:
1. A nitride semiconductor structure comprising: a plurality of crystal growth seed regions formed of a nitride semiconductor, of which the principal surface is an m-plane and which extends to a range that defines an angle of not less than 0 degrees and not more than 10 degrees with respect to an a-axis, wherein an S width that is the spacing between adjacent ones of the plurality of crystal growth seed regions is at least 50 μm; and a regrown nitride semiconductor layer including vertically grown regions in which crystals have grown upward from the plurality of the crystal growth seed regions and laterally grown regions in which crystals have grown laterally from the plurality of the crystal growth seed regions; wherein the laterally grown regions are formed of a nitride semiconductor which has extended in a c-axis direction from each of the plurality of the crystal growth seed regions; and a following mathematical requirement is satisfied: 0<α≦0.35 where α=β2−β1 β2 represents a tilt angle of an m-axis of the laterally grown regions in the a-axis direction thereof with respect to a normal line of the principal surface of the plurality of the crystal growth seed regions; and β1 represents a tilt angle of an m-axis of the vertically grown regions in the a-axis direction thereof with respect to the normal line of the principal surface of the plurality of the crystal growth seed regions.