Patent ID: 7781242

Claim:
A method of forming a vertical structure light emitting diode (LED) with heat exhaustion structure, comprising the steps of: a) providing a sapphire substrate; b) producing a plurality of recesses on the sapphire substrate, each of which has a depth of p; c) forming a buffer layer having a plurality of protrusions, each of which has a height of q smaller than p so that when the protrusions of the buffer layer are accommodated within the recesses of the sapphire substrate, a plurality of gaps are formed therebetween for heat exhaustion; d) growing a plurality of luminescent layers on the buffer layer, having a medium layer formed between the plurality of luminescent layers and the buffer layer; e) etching through the plurality of luminescent layers and the buffer layer to form a duct for heat exhaustion; f) removing the sapphire substrate by excimer laser lift-off (LLO); g) roughening the medium layer; and h) depositing electrodes on the roughened medium layer.