Methods for making thin layers of crystalline materials
First Claim
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1. A method for fabricating a layer of strain-relaxed, single-crystalline material, the method comprising:
- growing a layer of coherently strained single-crystalline material over a layer of sacrificial material, the layer of sacrificial material comprising one or more suspended sections and one or more supported sections, wherein the strain in the portions of single-crystalline material grown over the one or more suspended sections is lower than the strain in the portions of single-crystalline material grown over the one or more supported sections;
selectively removing the one or more suspended sections of the layer of sacrificial material, such that the portions of the single-crystalline material previously disposed over the one or more suspended sections are elastically relaxed; and
detaching the one or more elastically relaxed portions of the layer of single-crystalline material from the remainder of the layer of single-crystalline material.
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Abstract
Methods for making growth templates for the epitaxial growth of compound semiconductors and other materials are provided. The growth templates are thin layers of single-crystalline materials that are themselves grown epitaxially on a substrate that includes a thin layer of sacrificial material. The thin layer of sacrificial material, which creates a coherent strain in the single-crystalline material as it is grown thereon, includes one or more suspended sections and one or more supported sections.
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18 Claims
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1. A method for fabricating a layer of strain-relaxed, single-crystalline material, the method comprising:
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growing a layer of coherently strained single-crystalline material over a layer of sacrificial material, the layer of sacrificial material comprising one or more suspended sections and one or more supported sections, wherein the strain in the portions of single-crystalline material grown over the one or more suspended sections is lower than the strain in the portions of single-crystalline material grown over the one or more supported sections; selectively removing the one or more suspended sections of the layer of sacrificial material, such that the portions of the single-crystalline material previously disposed over the one or more suspended sections are elastically relaxed; and detaching the one or more elastically relaxed portions of the layer of single-crystalline material from the remainder of the layer of single-crystalline material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification