Patent ID: 8071401
Filing Date: 2011-12-06
Classification: H01L

Abstract:
1. 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) depositing a plurality of protrusions on the sapphire substrate, each of which has a height of p; c) forming a buffer layer having a plurality of recesses, each of which has a depth of q smaller than p so that when the protrusions are accommodated within the recesses of the buffer layer, 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 and the protrusions by excimer laser lift-off (LLO); g) roughening the medium layer; and h) depositing electrodes on the roughened medium layer.