发明名称 |
Large area optical quality synthetic polycrystalline diamond window |
摘要 |
A polycrystalline chemical vapour deposited (CVD) diamond wafer comprising: a largest linear dimension equal to or greater than 125 mm; a thickness equal to or greater than 200 μm; and one or both of the following characteristics measured at room temperature (nominally 298 K) over at least a central area of the polycrystalline CVD diamond wafer, said central area being circular, centred on a central point of the polycrystalline CVD diamond wafer, and having a diameter of at least 70% of the largest linear dimension of the polycrystalline CVD diamond wafer: an absorption coefficient≦̸0.2 cm−1 at 10.6 μm; and a dielectric loss coefficient at 145 GHz, of tan δ≦̸2×10−4. |
申请公布号 |
GB2497661(B) |
申请公布日期 |
2016.03.02 |
申请号 |
GB20120022319 |
申请日期 |
2012.12.12 |
申请人 |
ELEMENT SIX TECHNOLOGIES LIMITED |
发明人 |
PAUL NICHOLAS INGLIS;JOHN ROBERT BRANDON;JOSEPH MICHAEL DODSON;TIMOTHY PETER MOLLART |
分类号 |
C30B29/04;C01B31/06;C23C16/27;C30B25/02 |
主分类号 |
C30B29/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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