Patent ID: 9680059
Date: 2017-06-13
CPC Classifications: G02B,H01L

Claim:
1. A flip chip light emitting diode comprising: a P electrode; an N electrode; a P-type semiconductor mounted on the P electrode; a light emitting layer mounted on the P-type semiconductor; an N-type semiconductor mounted on the light emitting layer and on the N electrode; and a substrate mounted on the N-type semiconductor, the substrate having a first surface substantially facing towards the N-type semiconductor and a second surface, opposite the first surface, facing away from the N-type semiconductor; and a buffer layer located between the substrate and the N type semiconductor; wherein, a microstructure is formed on the second substrate surface, the microstructure including a plurality of micron main portions with a plurality of nanometer protrusions protruding from an outer surface of each micron main portion, a distance between the bottom ends of two adjacent micron main portions is varied between 0.2-1 μm.