Patent ID: 7002184
Filing Date: 2006-02-21
Classification: B82Y,H01L,H01S

Abstract:
1. A light-emitting semiconductor device comprising: an n-type layer formed over an insulating substrate, a portion of said n-type layer being exposed, a light emitting layer formed over the n-type layer, a p-type layer formed over the light-emitting layer, and an electrode formed on the exposed portion of the n-type layer, wherein the n-type layer comprising a first Si doped GaN layer and a second Si doped GaN layer, a carrier concentration of the second Si doped GaN layer is higher than a carrier of the first Si doped GaN layer, and the thickness of the second Si doped GaN layer is smaller than the thickness of the first Si doped GaN layer, and the thickness of the first n-type Si doped GaN layer is within a range of 1–5 μm.