Patent ID: 7595514

Claim:
A nitride-based semiconductor light emitting device, comprising: a substrate; a nitride-based multi-layered structure epitaxially formed on the substrate, the multi-layered structure including a first-type layer, an active layer and a second-type layer arranged along a direction away from the substrate in the order written, the second-type layer and the active layer cooperatively forming a developed mesa structure, the first-type layer having an exposed portion, the mesa structure having a top surface facing away from the substrate and a plurality of side surfaces adjoining the top surface, wherein a crystal growth orientation of the multi-layered structure intersects with <0001> crystal orientation thereof, and the top surface and the side surfaces are roughened surfaces; a first-type electrode formed on the exposed portion and brought into ohmic contact with the first-type layer; and a second-type electrode formed on the top surface and brought into ohmic contact with the second-type layer.