Single-crystal diamond material, and tool, radiation temperature monitor, and infrared optical component including said diamond material
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United States of America Patent
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Jun 30, 2020
Grant Date -
Nov 2, 2017
app pub date -
Oct 29, 2015
filing date -
Oct 29, 2014
priority date (Note) -
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Abstract
A single-crystal diamond material has a transmittance of light with a wavelength of greater than or equal to 410 nm and less than or equal to 750 nm of less than or equal to 15% for any wavelength, and is at least either of an electrical insulator according to optical evaluation and an electrical insulator according to electrical evaluation. A criterion of the optical evaluation can be a transmittance of light with a wavelength of 10.6 μm of greater than or equal to 1%. A criterion of the electrical evaluation can be an average resistivity of greater than or equal to 1×106 Ωcm. Accordingly, a single-crystal diamond material having a low transmittance of light in the entire region of the visible light region and exhibiting a black color is provided.
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