Patent ID: 9252330
Filing Date: 2016-02-02
CPC Classification: H01L

Claim Text:
1. A semiconductor light-emitting diode comprising: a substrate; an n-type nitride semiconductor layer; a p-type nitride semiconductor layer; an active layer region which includes an m plane nitride semiconductor layer and which is interposed between the n-type nitride semiconductor layer and the p-type nitride semiconductor layer; an n-type electrode which is electrically connected to the n-type nitride semiconductor layer; a p-type electrode which is electrically connected to the p-type nitride semiconductor layer; a light-emitting face, through which polarized light that has been produced in the active layer region is extracted out of the nitride semiconductor light-emitting element; wherein the substrate has a first principal surface and a second principal surface; the first principal surface of the substrate is opposite to the second principal surface of the substrate; the n-type nitride semiconductor layer has a first surface, a second surface, and a third surface; the third surface of the n-type nitride semiconductor layer is opposite to the first and second surfaces of the n-type nitride semiconductor layer; the first surface of the n-type nitride semiconductor layer is in contact with the active layer region; the second surface of the n-type nitride semiconductor layer is in contact with the n-type electrode; the third surface of the n-type nitride semiconductor layer is in contact with the first principal surface of the substrate; the second principal surface of the substrate is the light-emitting face; the second principal surface of the substrate is not in contact with an electrode; and the second principal surface of the substrate has a striped structure which is provided for the light-emitting face and which has a plurality of projections that run in a direction within ±3 degrees of the a-axis direction of the m plane nitride semiconductor layer, wherein each of the plurality of projections has at least one sloped sidewall which is not parallel to the light-emitting face.