Patent ID: 7588955

Claim:
A method for raising light emission efficiency of LED by using a nanorods-like structure, comprising: providing a sapphire substrate; forming an n-type GaN layer on the sapphire substrate; forming a multiple quantum well layer on the n-type GaN layer; forming a p-type GaN layer on the multiple quantum well layer; forming a nickel layer on a surface of the p-type GaN layer; forming a plurality of nickel particles by processing a rapid heat treatment by a proper temperature and a proper time; dry etching the p-type GaN layer and the multiple quantum well layer to form a plurality of nanorods by using a the nickel particles as a mask so that a plurality of nanorods-like structures are provided; removing the plurality of nickel particles by using wet etching; forming an oxide layer by processing a photo-electrochemical process used for conducting an oxidization reaction in order to encapsulate the plurality of nanorods-like structure the p-type GaN layer and the multiple quantum well layer; and coating a metal layer on the oxide layer to form the LED having the nanorods-like structure.