Patent ID: 8404503

Claim:
A method for making a light emitting diode, comprising: providing a light emitting diode chip, wherein the light emitting diode comprises a first semiconductor layer, an active layer, and a second semiconductor layer stacked together in that order; locating a patterned mask layer on a surface of the first semiconductor layer, wherein the patterned mask layer comprises a plurality of bar-shaped protruding structures aligned side by side, and a slot defined between each two adjacent protruding structures of the plurality of bar-shaped protruding structures to expose a portion of the first semiconductor layer; etching exposed portion of the first semiconductor layer, wherein the each two adjacent protruding structures begin to slant face to face until they are contacting each other to form a protruding pair; forming a plurality of M-shaped three-dimensional nano-structures on the surface of the first semiconductor layer by removing the mask layer; applying a first electrode to electrically connect with the first semiconductor layer; and locating a second electrode to electrically connect with the second semiconductor layer.