Patent ID: 7859007
Filing Date: 2010-12-28
Classification: H01L,Y02E

Abstract:
1. An ultraviolet light-emitting device adapted to emit ultraviolet light in a wavelength range from 330 nm to less than 365 nm, said device comprising: a nitride semiconductor substrate having a dislocation density of at most 1E7 cm an ultraviolet light-emitting layer that is adapted to emit the ultraviolet light in the wavelength range from 330 nm to less than 365 nm, and that is formed as a single layer comprising an InAlGaN quaternary alloy on a side of a first main surface of said nitride semiconductor substrate; an Al an Al a first GaN layer of the first conductivity type and a second GaN layer of the second conductivity type arranged with said Al wherein said InAlGaN quaternary alloy of said light-emitting layer is located between said Al wherein a composition ratio (x1, x2) of Al in said Al wherein a total thickness of said Al