Patent ID: 6917061

Claim:
A compound semiconductor device, comprising: a first GaAs layer: a second GaAs layer formed on the first GaAs layer; a third p-type GaAs layer formed on the second GaAs layer; a p-type In y Ga 1−y As layer (0.0≦Y≦0.3) formed on the third GaAs layer; an n type In x Ga 1−x P layer (0.5<x<0.7) formed on the In y Ga 1−y As layer; an n type In 0.51 Ga 0.49 P layer formed on the n type In x Ga 1−x P layer; an n type GaAs layer formed on the n type In 0.51 Ga 0.49 P layer; and an n type In x Ga 1−x As layer (0.0<x<0.6) formed on the n type GaAs layer.