Patent ID: 8772063
Filing Date: 2014-07-08
Classification: H01L

Abstract:
1. A method for making a light emitting diode comprising: providing a substrate having an epitaxial growth surface; growing a first semiconductor layer on the epitaxial growth surface, an active layer on a surface of the first semiconductor layer, and a second semiconductor layer on a surface of the active layer in sequence, wherein the first semiconductor layer, the active layer, and the second semiconductor layer cooperatively constituting a source layer; disposing a third optical symmetric layer on a surface of the second semiconductor layer away from the substrate, wherein a refractive index of the third optical symmetric layer is in a range from about 1.2 to about 1.5; forming a metallic layer on a surface of the third optical symmetric layer away from the substrate; disposing a fourth optical symmetric layer on a surface of the metallic layer away from the substrate, wherein a refractive index of the fourth optical symmetric layer is in a range from about 1.2 to about 1.5; forming a first optical symmetric layer on a surface of the fourth optical symmetric layer away from the substrate, and a second optical symmetric layer on a surface of the first optical symmetric layer away from the substrate in sequence, wherein a refractive index difference between the first optical symmetric layer and the source layer is less than or equal to 0.3, and a refractive index difference between the second optical symmetric layer and the substrate is less than or equal to 0.1; and applying a first electrode electrically connected with the first semiconductor layer, and applying a second electrode electrically connected with the second semiconductor layer.