Active solid-state devices (e.g. – transistors – solid-state diode – Specified wide band gap semiconductor material other than...
Patent
1996-02-07
1998-03-10
Crane, Sara W.
Active solid-state devices (e.g., transistors, solid-state diode
Specified wide band gap semiconductor material other than...
257 22, 257 77, 257 82, 257192, H01L 310256
Patent
active
057264627
ABSTRACT:
A semiconductor structure. The semiconductor structure comprises a plurality of semiconductor layers formed on a substrate including at least one layer of a III-V compound semiconductor alloy comprising aluminum (Al) and antimony (Sb), with at least a part of the AlSb-alloy layer being chemically converted by an oxidation process to form superposed electrically insulating and electrically conducting portions. The electrically insulating portion formed from the AlSb-alloy layer comprises an oxide of aluminum (e.g. Al.sub.2 O.sub.3), while the electrically conducting portion comprises Sb. A lateral oxidation process allows formation of the superposed insulating and conducting portions below monocrystalline semiconductor layers for forming many different types of semiconductor structures having particular utility for optoelectronic devices such as light-emitting diodes, edge-emitting lasers, vertical-cavity surface-emitting lasers, photodetectors and optical modulators (waveguide and surface normal), and for electronic devices such as heterojunction bipolar transistors, field-effect transistors and quantum-effect devices. The invention is expected to be particularly useful for forming light-emitting devices for use in the 1.3-1.6 .mu.m wavelength range, with the AlSb-alloy layer acting to define an active region of the device and to effectively channel an electrical current therein for efficient light generation.
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Lear Kevin L.
Spahn Olga B.
Crane Sara W.
Hohimer John P.
Sandia Corporation
Wille Douglas
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