Patent ID: 8525196

Claim:
A nitride-based semiconductor LED, comprising: a substrate having a rectangle shape and of which a ratio of a width and a length of the substrate is equal to or more than 1.5; an n-type nitride semiconductor layer disposed on the substrate and composed of an n-type semiconductor material having a compositional formula of In X Al Y Ga 1-X-Y N (0≦X, 0≦Y, and X+Y≦1); an active layer and a p-type nitride semiconductor layer sequentially disposed on a predetermined region of the n-type nitride semiconductor layer, the active layer being composed of a semiconductor material having a compositional formula of In X Al Y Ga 1-X-Y N (0≦X, 0≦Y, and X+Y≦1), the p-type nitride semiconductor layer being composed of a p-type semiconductor material having a compositional formula of In X Al Y Ga 1-X-Y N (0≦X, 0≦Y, and X+Y≦1); a transparent electrode disposed on the p-type nitride semiconductor layer; a p-electrode pad disposed on the transparent electrode; and an n-electrode pad disposed on the n-type nitride semiconductor layer, wherein: the p-electrode pad, devoid of any elongated protrusion or any auxiliary electrode, is spaced apart from an outer edge line of the p-type nitride semiconductor layer by a distance of 50 to 200 μm, such that a uniform luminous effect is obtained in the entire LED, the center of the outer edge line of the p-type nitride semiconductor layer intersects with a straight line that connects a center of the p-electrode pad and a center of the n-electrode pad, and the n-type semiconductor layer substantially surrounds the n-electrode.