Patent ID: 7160744

Claim:
A method of fabricating Light Emitting Diodes (LEDs), comprising the steps of: preparing a substrate having opposite first and second sides; directing a laser beam onto the first side of the substrate to form a first finely roughened structure on the first side of said substrate; forming an n-doped semiconductor layer, an active layer and a p-semiconductor layer in the recited order on the first finely roughened structure of the first side of the substrate to obtain a resultant structure; mesa-etching the resultant structure to expose a partial area of the n-doped semiconductor layer; forming a p-electrode on the p-doped semiconductor layer and an n-electrode on the exposed area of the n-doped semiconductor layer; polishing the second side of the substrate to reduce the thickness of the substrate after the step of forming the p-electrode and the n-electrode; and directing a laser beam onto the second side of the substrate to form a second finely roughened structure on the second side of said substrate.