Patent ID: 7442569

Claim:
A method of manufacturing a vertical GaN-based LED, the method comprising: forming a GaN-based buffer layer on a sapphire substrate; forming an undoped GaN layer on the GaN-based buffer layer to obtain crystallinity; forming an AlGaN layer on the undoped GaN layer; forming an undoped GaN layer on the AlGaN layer so as to form a 2DEG layer at a junction interface of the AlGaN layer; sequentially forming an n-type GaN layer, an active layer, and a p-type GaN layer on the undoped GaN layer to form a GaN-based LED structure; forming a p-electrode on the GaN-based LED structure; attaching a conductive substrate onto the p-electrode; removing the sapphire substrate and the GaN-based buffer layer through a laser lift-off (LLO) process, and removing the undoped GaN layer from the AlGaN layer through a chemical mechanical polishing (CMP) process; and forming an n-electrode on the AlGaN layer from which the undoped GaN layer has been removed.