METHOD FOR MANUFACTURING NITRIDE SEMICONDUCTOR LIGHT-EMITTING DEVICE

To provide a method for manufacturing a nitride semiconductor light-emitting device, by which the surface of a p-type contact layer can be flattened.SOLUTION: A method for manufacturing a nitride semiconductor light-emitting device comprises the steps of: growing a p-type clad layer 7 of 70% or more...

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Hauptverfasser: PERNO SILYL, ASAI MIHO, MATSUKURA YUSUKE
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a method for manufacturing a nitride semiconductor light-emitting device, by which the surface of a p-type contact layer can be flattened.SOLUTION: A method for manufacturing a nitride semiconductor light-emitting device comprises the steps of: growing a p-type clad layer 7 of 70% or more in average Al composition rate; and growing a p-type contact layer 8 on the p-type clad layer 7. In the method, a ratio Fp/FIII of a flow rate Fp [μmol/min] of a material gas of a p-type impurity to a flow rate FIII [μmol/min] of a material gas of a group III element is defined as p/III ratio. In the step of growing the p-type clad layer 7, a growth velocity is 2.5 nm/min or less, p/III ratio is 0.0002 or more and 0.0400 or less, and V/III ratio is 7000 or less. In the step of growing the p-type contact layer 8, the growth velocity is 3.3 nm/min or less, and p/III ratio is 0.0200 or more, and V/III ratio is 10000 or more.SELECTED DRAWING: Figure 1 【課題】p型コンタクト層の表面を平坦にすることができる窒化物半導体発光素子の製造方法を提供する。【解決手段】窒化物半導体発光素子の製造方法は、平均Al組成比が70%以上のp型クラッド層7を成長させる工程と、p型クラッド層7上にp型コンタクト層8を成長させる工程とを備える。III族元素の原料ガスの流量FIII[μmol/min]に対するp型不純物の原料ガスの流量Fp[μmol/min]の比率Fp/FIIIをp/III比と定義する。p型クラッド層7を成長させる工程においては、成長速度を2.5nm/min以下、p/III比を0.0002以上0.0400以下、及びV/III比を7000以下とし、p型コンタクト層8を成長させる工程においては、成長速度を3.3nm/min以下、p/III比を0.0200以上、V/III比を10000以上とする。【選択図】図1