Patent ID: 8841149

Claim:
A method for making light emitting diode, the method comprising: providing a substrate having an epitaxial growth surface; epitaxially growing a first semiconductor layer, an active layer, and a second semiconductor layer on the epitaxial growth surface of the substrate in that sequence; forming a first optical symmetric layer on the second semiconductor layer; applying a metallic layer on the first optical symmetric layer; forming a second optical symmetric layer on the metallic layer; applying a first electrode electrically connected to the first semiconductor layer; and applying a second electrode electrically connected to the second semiconductor layer; wherein a first effective refractive index n 1 of the second optical symmetric layer, and a second effective refractive index n 2 of an integrated structure satisfy |n 1 −n 2 |≦0.5, wherein the integrated structure comprises the substrate, the composite semiconductor layer, and the first optical symmetric layer.