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公开(公告)号：US20220154366A1
公开(公告)日：2022-05-19
申请号：US17593200
申请日：2020-03-30
Applicant: ELEMENT SIX TECHNOLOGIES LIMITED
Abstract: Single crystal CVD diamond material comprising a total nitrogen concentration of at least 5 ppm and a neutral single substitutional nitrogen. Ns0, to total single substitutional nitrogen, Ns, ratio of at least 0.7. Such a diamond is observed to have a relatively low amount of brown colouration despite the relatively high concentration of nitrogen A method of making the single crystal diamond is also disclosed, the method including growing the CVD diamond in process gases comprising 60 to 200 ppm nitrogen, in addition to a carbon-containing gas, and hydrogen, wherein the ratio of carbon atoms in the carbon-containing gas to hydrogen atoms in the hydrogen gas is 0.5 to 1.5%.
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公开(公告)号：US20220154368A1
公开(公告)日：2022-05-19
申请号：US17593201
申请日：2020-03-30
Applicant: ELEMENT SIX TECHNOLOGIES LIMITED
IPC: C30B29/68 , C30B29/04 , C30B25/20 , C30B25/18 , C23C16/00 , C23C16/27 , C23C16/02 , C23C16/56 , C30B33/00
Abstract: A method of forming a diamond composite body and the diamond composite body. A first single crystal diamond body is provided, which contains nitrogen and has a uniform strain such that over an area of at least 1×1 mm, at least 90 percent of points display a modulus of strain-induced shift of NV resonance of less than 200 kHz, wherein each point in the area is a resolved region of 50 μm2. The first single crystal diamond body is treated to convert at least some of the nitrogen to form at least 0.3 ppm nitrogen-vacancy, NV−, centres. A CVD process is used to grow a second single crystal diamond body on a surface of the first single crystal diamond body. The second single crystal diamond body has an NV concentration less than or equal to 10 times lower than the NV− concentration in the first single crystal diamond body.
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