Patent ID: 7331566
Filing Date: 2008-02-19
Classification: H01L

Abstract:
1. A nitride semiconductor light emitting device, comprising: an n-type nitride semiconductor layer formed on a substrate; an active layer formed on the n-type nitride semiconductor layer; a p-type nitride semiconductor layer formed on the active layer; an undoped GaN layer formed on the p-type nitride semiconductor layer; an n-type AlGaN layer formed on the undoped GaN layer to form a two-dimensional electron gas (2DEG) layer at a bonding interface between the n-type AlGaN layer and the undoped GaN layer; and an n-side electrode and a p-side electrode respectively formed on the n-type nitride semiconductor layer and the n-type AlGaN layer to be connected to each other, wherein the undoped GaN layer has a thickness of 10˜100 Å, the n-type AlGaN layer has a thickness of 50˜250 Å, and the n-type AlGaN layer has an Al content in the range of 10˜50%.