Patent ID: 6307219
Filing Date: 2001-10-23
Classification: B82Y,H01L,H01S

Abstract:
A gallium-nitride-group compound semiconductor light-emitting device comprising an n-type clad layer, a light-emitting layer and a p-type clad layer of gallium-nitride-group compound semiconductor stacked in the order on a substrate,wherein said light-emitting layer is formed of In.sub.a Ga.sub.l-a N (0<a.ltoreq.1),said p-type clad layer is formed of Al.sub.x In.sub.y Ga.sub.l-x-y N (0<.times.<1, 0.ltoreq.y<1), of which a composition distribution is varied in a direction of layer thickness so as a forbidden band width gradually decreases along with an increasing distance from said light-emitting layer, anda p-side electrode is formed in contact with said p-type clad layer.