Patent ID: 7485902
Filing Date: 2009-02-03
Classification: H01L

Abstract:
1. A nitride-based semiconductor light-emitting device comprising: a first conductivity type first nitride-based semiconductor layer formed on a substrate; an active layer, formed on said first nitride-based semiconductor layer; a first undoped optical guide layer formed on said active layer; a second conductivity type second nitride-based semiconductor layer, having a single layer structure with a thickness of at least 0.1 μm, formed on said first undoped optical guide layer; an undoped contact layer formed directly on said second nitride-based semiconductor layer; and an electrode formed directly on said undoped contact layer, wherein said undoped contact layer consists of a nitride-based semiconductor and has a single-layer structure and a thickness of at least about 1 nm and not more than about 10 nm, and the undoped contact layer does not include Al.