Method of producing silicon-germanium-on-insulator material using unstrained Ge-containing source layers
First Claim
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1. A method of fabricating a relaxed, high-quality single-crystal SiGe-on-insulator substrate material comprising the steps of:
- exposing a single-crystal Si-containing layer of a prefabricated silicon-on-insulator substrate to an unstrained Ge-containing source; and
heating the substrate exposed to said unstrained Ge-containing source to cause diffusion of Ge provided by said unstrained Ge-containing source into said single-crystal Si-containing layer thereby forming a relaxed, single-crystal SiGe alloy layer on a barrier layer of said prefabricated SOI substrate.
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Abstract
A method of fabricating a high-quality relaxed SiGe-on-insulator substrate material is provided in which a prefabricated silicon-on-insulator substrate is first exposed to an unstrained Ge-containing source and then heated (annealed/oxidized) to cause Ge diffusion and thermal mixing of Ge within a single-crystal Si-containing layer of the prefabricated silicon-on-insulator substrate. The unstrained Ge-containing source can comprise a solid Ge-containing source, a gaseous Ge-containing source, or ions of Ge.
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Citations
24 Claims
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1. A method of fabricating a relaxed, high-quality single-crystal SiGe-on-insulator substrate material comprising the steps of:
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exposing a single-crystal Si-containing layer of a prefabricated silicon-on-insulator substrate to an unstrained Ge-containing source; and heating the substrate exposed to said unstrained Ge-containing source to cause diffusion of Ge provided by said unstrained Ge-containing source into said single-crystal Si-containing layer thereby forming a relaxed, single-crystal SiGe alloy layer on a barrier layer of said prefabricated SOI substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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