Thick pseudomorphic nitride epitaxial layers
First Claim
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1. A semiconductor device comprising:
- an aluminum nitride single-crystal substrate;
at least one pseudomorphic strained layer disposed thereover, the strained layer comprising at least one of AlN, GaN, InN, or an alloy thereof; and
disposed over the at least one strained layer, a semiconductor layer that is lattice-mismatched to the substrate and substantially relaxed.
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Abstract
In various embodiments, a semiconductor device includes an aluminum nitride single-crystal substrate, a pseudomorphic strained layer disposed thereover that comprises at least one of AlN, GaN, InN, or an alloy thereof, and, disposed over the strained layer, a semiconductor layer that is lattice-mismatched to the substrate and substantially relaxed.
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Citations
20 Claims
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1. A semiconductor device comprising:
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an aluminum nitride single-crystal substrate; at least one pseudomorphic strained layer disposed thereover, the strained layer comprising at least one of AlN, GaN, InN, or an alloy thereof; and disposed over the at least one strained layer, a semiconductor layer that is lattice-mismatched to the substrate and substantially relaxed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 17, 19)
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9. A method of forming a semiconductor device, the method comprising:
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forming, over a single-crystal substrate, at least one pseudomorphic strained layer comprising at least one of AlN, GaN, InN, or an alloy thereof; and forming, over the at least one strained layer, a semiconductor layer that is lattice-mismatched to the substrate and substantially relaxed without (i) relaxing the at least one strained layer, and (ii) propagation of defects from the semiconductor layer into the at least one strained layer. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 18, 20)
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Specification