Epitaxial gallium arsenide semiconductor on silicon substrate wi

Details Epitaxial gallium arsenide semiconductor on silicon substrate wi Epitaxial gallium arsenide semiconductor on silicon substrate wi

1989-03-20

1990-05-22

James, Andrew J.

357 4, 357 30, 357 60, H01L 29205, H01L 2904

Patent

active

049281542

ABSTRACT:
A semiconductor wafer having an epitaxial GaAs layer, including a monocrystalline Si substrate having a major surface which is inclined at an off angle between 0.5.degree. and 5.degree. with respect to (100); and at least one intermediate layer epitaxially grown on the major surface of the monocrystalline Si substrate, as a buffer layer for accommodating a lattice mismatch between the Si substrate and the epitaxial GaAs layer which is epitaxially grown on a major surface of a top layer of the at least one intermediate layer. The at least one intermediate layer may comprise one or more GaP/GaAsP, GaAsP/GaAs superlattice layers. The wafer may be used to produce a semiconductor light emitting element which has a plurality of crystalline GaAs layers including a light emitting layer epitaxially grown on the GaAs layer on the intermediate layer. The wafer may also be used to produce a compound semiconductor device such as amplifying and switching elements, light emitting and receiving elements and photovolataic elements. Methods for producing the semiconductor wafer, light emitting element and compound semiconductor devices are also disclosed.

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