Patent ID: 7709858

Claim:
A nitride semiconductor light emitting device comprising: a processed substrate whose main surface is (0001) surface where a dug out region which is a recess in stripe form and a hill which is a protrusion are provided in a surface of a nitride semiconductor substrate where at least the surface is formed of a nitride semiconductor; and a nitride semiconductor growth layer which is formed of a plurality of nitride semiconductor thin films layered on the surface of the processed substrate, wherein the dug out region is a trench having sides and a bottom, a first region having a first average defect density and a second region having a defect density of which the value is higher than that of the first average defect density are respectively formed so as to be aligned in stripe form in the direction parallel to the direction in which the dug out region extends in the processed substrate, the polarity of the first region and the polarity of the second region are inversions of each other, and in the processed substrate before the nitride semiconductor growth layer is layered, the second region and the first region which are positioned in both sides of the second region are both exposed from the bottom of the dug out region.