CVD SINGLE CRYSTAL DIAMOND MATERIAL
First Claim
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1. A CVD single crystal diamond material wherein the diamond material has the following characteristics, when measured at room temperature:
- a longest linear internal dimension greater than 7 mm,a birefringence of below 1×
10−
5 determined using a light beam with a cross-sectional area greater than 0.01 mm2 and along an internal path greater than 7 mm andan absorption coefficient below 0.010 cm−
1 determined at a wavelength of 1064 nm.
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Abstract
Single crystal diamond material produced using chemical vapour deposition (CVD), and particularly diamond material having properties suitable for use in optical applications such as lasers, is disclosed. In particular, a CVD single crystal diamond material having preferred characteristics of longest linear internal dimension, birefringence and absorption coefficient, when measured at room temperature, is disclosed. Uses of the diamond material, including in a Raman laser, and methods of producing the diamond are also disclosed.
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Citations
31 Claims
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1. A CVD single crystal diamond material wherein the diamond material has the following characteristics, when measured at room temperature:
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a longest linear internal dimension greater than 7 mm, a birefringence of below 1×
10−
5 determined using a light beam with a cross-sectional area greater than 0.01 mm2 and along an internal path greater than 7 mm andan absorption coefficient below 0.010 cm−
1 determined at a wavelength of 1064 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 26, 27, 28, 29, 30, 31)
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- 22. A method of producing a CVD single crystal diamond within a CVD reactor using a gas phase with multiple growth stages, at least two of the multiple growth stages being distinguished by changing the nitrogen concentration in the gas phase within the CVD reactor, at least one of the at least two growth stages having a nitrogen concentration within the gas phase of greater than or equal to 300 parts per billion and less than 5 parts per million, calculated as molecular nitrogen, and at least one other of the at least two growth stages having a nitrogen concentration within the gas phase of greater than 0.001 parts per billion and less than 250 parts per billion, calculated as molecular nitrogen.
Specification