Patent ID: 8048701

Claim:
A method for fabricating a nitride semiconductor light emitting device using a hybrid buffer layer, the method comprising: a first step of forming an Al x Ga 1-x N(0≦x≦1) layer on a sapphire (Al 2 O 3 ) substrate; a second step of forming a three-dimensional crystal seed layer and AlO y N z by recrystallizing under NH 3 gas atmosphere said sapphire (Al 2 O 3 ) substrate on which said Al x Ga 1-x N(0≦x<1) layer is formed, said crystal seed layer being made of a material represented by a general formula of Al x Ga 1-x N(0≦x<1), said AlO y N z being formed by reaction of a surface of said sapphire (Al 2 O 3 ) substrate with NH 3 gas; and a third step of forming an AlN nanostructure by annealing the sapphire (Al 2 O 3 ) substrate under NH 3 gas atmosphere after said second step so as to form the hybrid buffer layer composed of the three-dimensional crystal seed layer and the AlN nanostructure, both formed on the sapphire (Al 2 O 3 ) substrate.