Patent ID: 6420733
Filing Date: 2002-07-16
Classification: B82Y,H01L,Y10S

Abstract:
A semiconductor light-emitting device, comprising:a first semiconductor layer made of group III-V gallium nitride compound semiconductor doped with impurities of high density and having n-type conduction; a second semiconductor layer laminated on said first semiconductor layer, said second semiconductor layer being made of group III-V gallium nitride compound semiconductor doped with impurities of lower density than said first semiconductor layer and having n-type conduction; a light-emitting layer of superlattice structure laminated on said second semiconductor layer, said light-emitting layer including a plurality of barrier layers of InY1Ga1âˆ’YN (Y1&gE;0) and a plurality of quantum well layers of InY2Ga1âˆ’Y2N (Y2>Y1, Y2>0) alternately laminated with each other; a third semiconductor layer laminated on said light-emitting layer, said third semiconductor layer being made of group III-V gallium nitride compound semiconductor doped with impurities and having p-type conduction, said third semiconductor layer having a broader band gap than said barrier layer of said light-emitting layer; a fourth semiconductor layer laminated on said third semiconductor layer, said fourth semiconductor layer being made of group III-V gallium nitride compound semiconductor doped with impurities of higher density than said third semiconductor layer and having p-type conduction; a first electrode disposed on and electrically coupled with said first semiconductor layer; and a second electrode disposed on and electrically coupled with said fourth semiconductor layer.