METHOD FOR GROWING EPITAXIAL DIAMOND
First Claim
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1. A method for growing epitaxial diamond comprising:
- providing a diamond substrate;
depositing at least a metallic layer on the diamond substrate, wherein a metal composition of the metallic layer has at least one of the following features that lattice mismatch between the metal composition and diamond is less than 15% and dissolution rate of carbon in the metal composition is less than 2 wt %;
providing a reaction atmosphere; and
depositing an epitaxial diamond layer on the diamond substrate and the metallic layer.
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Abstract
A method for growing epitaxial diamond is provided here. A metallic layer is deposited on a diamond substrate and is followed by an epitaxial diamond film deposited on top of the metallic layer. As a buffer layer, the metallic layer relieves stress accumulated in the thin film of the epitaxial diamond to prevent cracks. In consequence, diamond epitaxial layers with desired thickness and good quality can be obtained.
9 Citations
26 Claims
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1. A method for growing epitaxial diamond comprising:
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providing a diamond substrate; depositing at least a metallic layer on the diamond substrate, wherein a metal composition of the metallic layer has at least one of the following features that lattice mismatch between the metal composition and diamond is less than 15% and dissolution rate of carbon in the metal composition is less than 2 wt %; providing a reaction atmosphere; and depositing an epitaxial diamond layer on the diamond substrate and the metallic layer. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11)
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6. The method for growing epitaxial diamond according to claim wherein the thickness of the metallic layer is less than 1 micrometer.
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12. A method for growing epitaxial diamond comprising:
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providing a diamond substrate; deposing at least a metallic layer on the diamond substrate, wherein a metal composition of the metallic layer has at least one of the following features that lattice mismatch between the metal composition and diamond is less than 15% and dissolution rate of carbon in the metal composition is less than 2 wt %; providing an annealing process to crack the metallic layer into a non-continuous film; providing a reaction atmosphere; and depositing an epitaxial diamond layer on the diamond substrate and the metallic layer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification