Patent ID: 6043509
Filing Date: 2000-03-28
Classification: H01L

Abstract:
A light-emitting diode having a plurality of hetero-junctions of aluminum gallium arsenide, comprising:a substrate of p-type gallium arsenide;an intervening layer of p-type Al.sub.x1 Ga.sub.1-x As formed on said substrate;a cladding layer of p-type Al.sub.x2 Ga.sub.1-x2 As formed on said intervening layer;an active layer of p-type Al.sub.x3 Ga.sub.1-x3 As formed an said cladding layer; anda window layer of n-type Al.sub.x4 Ga.sub.1-x4 As formed on said active layer;wherein x1, x2, x3 and x4 represent mixed crystal ratios of aluminum to arsenic of said layers, respectively, and meet the condition in that;x2.gtoreq.x4>x1.gtoreq.x3 (0.ltoreq.x1, x2, x3, x4.ltoreq.1).