Patent ID: 7846753
Filing Date: 2010-12-07
Classification: H01L

Abstract:
1. A method of making a vertical GaN-based LED, the method comprising: providing a sapphire substrate; sequentially forming a u-GaN layer, a highly doped stop layer, an n-type GaN layer, an active layer, and a p-type GaN layer on the sapphire substrate, wherein the u-GaN layer, a highly doped stop layer, an n-type GaN layer, an active layer, and a p-type GaN layer are a plurality of layers; forming a plurality of stop points in the plurality of layers; forming a conductive substrate on the p-type GaN layer; removing the sapphire substrate using mechanical thinning; removing a part of the u-GaN layer using mechanical thinning, wherein the mechanical thinning stops at an end of the plurality of stop points; selectively etching the u-type GaN layer and exposing at least a part of the highly doped stop layer; removing the u-type GaN layer; and forming an n-electrode on the highly doped stop layer.