Patent ID: 6066862
Filing Date: 2000-05-23
Classification: B82Y,H01L

Abstract:
A light emitting diode comprising:a semiconductor substrate of a first conductivity type;a lower cladding layer of AlGaInP of said first conductivity type formed on said substrate;an active layer of undoped AlGaInP formed on said lower cladding layer; and an upper cladding structure comprising:a first layer of AlGaInP of a second conductivity type, which is lattice matched to said substrate, formed on said active layer;a second layer of AlGaInP of said second conductivity type formed on said first layer, said second layer having sufficiently small thickness and low doping concentration for providing high resistivity;and an ohmic contact layer of (Al.sub.x Ga.sub.1-x).sub.y In.sub.1-y P of said second conductivity type with 0.ltoreq.x.ltoreq.0.1 and 0.7.ltoreq.y.ltoreq.1 formed on said second layer.