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    Single crystal synthetic diamond material via chemical vapour deposition
    1.
    发明授权
    Single crystal synthetic diamond material via chemical vapour deposition 有权

    公开(公告)号：US11060204B2

    公开(公告)日：2021-07-13

    申请号：US16464351

    申请日：2017-11-30

    Applicant: ELEMENT SIX TECHNOLOGIES LIMITED

    Inventor： Daniel James Twitchen ,  Harpreet Kaur Dhillon ,  Rizwan Uddin Ahmad Khan

    IPC: C30B29/04 ,  C30B25/18 ,  C30B25/20 ,  C30B33/04 ,  C30B33/12

    Abstract: There is described a single crystal CVD diamond material comprising three orthogonal dimensions of at least 2 mm; one or more regions of low optical birefringence, indicative of low strain, such that in a sample of the single crystal CVD diamond material having a thickness in a range 0.5 mm to 1.0 mm and an area of greater than 1.3 mm×1.3 mm and measured using a pixel size of area in a range 1×1 μm2 to 20×20 μm2, a maximum value of Δn[average] does not exceed 1.5×10−4 for the one or more regions of low optical birefringence, where Δn[average] is an average value of a difference between refractive index for light polarised parallel to slow and fast axes averaged over the sample thickness; one or more regions of high optical birefringence, indicative of high strain, such that in said sample of the single crystal CVD diamond material and measured using said pixel size, Δn[average] is greater than 1.5×10−4 and less than 3×10−3; and is wherein every 1.3 mm×1.3 mm area of the sample of the single crystal CVD diamond material comprises at least one of said regions of high optical birefringence. There is also described a method of making the CVD diamond material.

    SINGLE CRYSTAL CHEMICAL VAPOUR DEPOSITED SYNTHETIC DIAMOND MATERIALS HAVING UNIFORM COLOUR
    3.
    发明申请
    SINGLE CRYSTAL CHEMICAL VAPOUR DEPOSITED SYNTHETIC DIAMOND MATERIALS HAVING UNIFORM COLOUR 审中-公开
    单晶化学蒸气沉积合成金刚石材料具有均匀的颜色

    公开(公告)号：US20150240382A1

    公开(公告)日：2015-08-27

    申请号：US14426727

    申请日：2013-09-13

    Applicant: ELEMENT SIX TECHNOLOGIES LIMITED

    Inventor： Harpreet Kaur Dhillon ,  Ian Friel ,  Daniel James Twitchen ,  Sarah Louise Geoghegan ,  Helen Jennifer Gallon ,  Neil Perkins ,  Philip Maurice Martineau

    IPC: C30B29/04 ,  C30B25/16

    CPC classification number: C30B29/04 ,  C30B25/02 ,  C30B25/165 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/26

    Abstract: A coloured single crystal CVD synthetic diamond material comprising: a plurality of layers, wherein the plurality of layers includes at least two sets of layers which differ in terms of their defect composition and colour, wherein defect type, defect concentration, and layer thickness for each of the at least two sets of layers is such that if the coloured single crystal CVD diamond material is fabricated into a round brilliant cut diamond comprising a table and a culet, and having a table to culet depth greater than 1 mm, the round brilliant cut diamond comprises a uniform colour as viewed by naked human eye under standard ambient viewing conditions in at least a direction through the table to the culet.

    Abstract translation: 一种着色的单晶CVD合成金刚石材料，包括：多个层，其中所述多个层包括至少两组在其缺陷组成和颜色方面不同的层，其中每个层的缺陷类型，缺陷浓度和层厚度 所述至少两组层是这样的，即如果着色的单晶CVD金刚石材料制成圆形明亮的切割金刚石，其包括台和底部，并且具有大于1mm的底部深度的台面，则圆形切割 金刚石在标准环境观察条件下至少在通过工作台至底部的方向上由裸眼观察到均匀的颜色。

    Synthetic diamond optical elements
    4.
    发明授权
    Synthetic diamond optical elements 有权

    公开(公告)号：US10809420B2

    公开(公告)日：2020-10-20

    申请号：US15316799

    申请日：2015-06-10

    Applicant: Element Six Technologies Limited

    Inventor： Alexander Clark Muhr ,  Yevgeny Vasilievich YeAnoikin ,  Daniel James Twitchen

    IPC: G02B1/118 ,  G02B5/30 ,  G02B1/02

    Abstract: An optical element includes a synthetic diamond material and an optical surface pattern formed directly in at least one surface of the synthetic diamond material. The optical surface pattern includes a plurality of projections separated by trenches, the projections spaced apart with a periodicity d. The periodicity d is between 65 and 99% of a zeroeth order diffraction limit above which non zeroeth diffraction orders are observed at an operating wavelength λ. The optical surface pattern has a fill fraction in a range 0.1 to 0.6, the fill fraction defined as [area of projection in one periodic unit]/[area of the periodic unit]. The optical element has an absorption coefficient measured at room temperature of ≤0.2 cm-1 at a wavelength of 10.6 μm.

    Method of fabricating a plurality of single crystal CVD synthetic diamonds
    9.
    发明授权
    Method of fabricating a plurality of single crystal CVD synthetic diamonds 有权

    公开(公告)号：US10590563B2

    公开(公告)日：2020-03-17

    申请号：US15762486

    申请日：2016-09-14

    Applicant: ELEMENT SIX TECHNOLOGIES LIMITED

    Inventor： Christopher John Howard Wort ,  Daniel James Twitchen ,  John Lloyd Collins

    IPC: C30B25/00 ,  C30B25/20 ,  C30B29/04 ,  C23C16/27 ,  C30B25/18

    Abstract: A method of fabricating a plurality of single crystal CVD diamonds, the method comprising: coating a carrier substrate with a layer of polycrystalline CVD diamond material; bonding a plurality of single crystal diamond substrates to the layer of polycrystalline CVD diamond material on the carrier substrate; growing single crystal CVD diamond material on the plurality of single crystal diamond substrates to form a plurality of single crystal CVD diamonds; and separating the plurality of single crystal CVD diamonds from the layer of polycrystalline CVD diamond material on the carrier substrate and any polycrystalline CVD diamond material which has grown between the plurality of single crystal CVD diamonds to yield a plurality of individual single crystal CVD diamonds.

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