CVD synthetic diamond

CVD synthetic diamond

Chemical vapour deposition (CVD) synthetic diamond products are used for a wide range of high technology applications.

Element Six manufactures a range of chemical vapour deposition (CVD) synthetic diamond products, which are used for a wide range of high technology applications including electronics, sensors, lasers and thermal management.

Chemical vapour deposited (CVD) synthetic diamond is typically produced in a vacuum system below atmospheric pressure, with the carbon atoms supplied from a gas such as methane. The ability to control gas purity makes CVD diamond growth a particularly effective way to make synthetic diamond for applications requiring very high chemical purity, including optical, electronic and certain mechanical applications.

Electronic wafers
Element Six has a range of very high purity material which has been developed for use in a range of innovative electronics applications, including electronic devices and sensors. This material typically has less than one carbon atom in 200 million replaced by an impurity atom.

Optical grade single crystal CVD synthetic diamond
Element Six has engineered synthetic diamond suitable for demanding optical applications, which opens up the possibility of exploiting the excellent optical and thermal properties of synthetic diamond in a consistently engineered material without compromising other aspects of device performance. Synthetic diamond offers a number of properties that make it unique as an optical material; it is transparent over a very wide spectral range (spanning the UV to the THz), with low absorption coefficients at key laser frequencies, it has a very high thermal conductivity enabling any heat absorbed to be dissipated, and it has a low thermal expansion coefficient, limiting any thermally generated strain which can otherwise result in beam distortion or window failure.

Optical grade single crystal CVD synthetic diamond, low birefringence
Birefringence changes the polarisation of light as it passes through synthetic diamond, and Element Six’s low birefringence optical CVD diamond is used in a range of existing and novel laser technologies, including semiconductor and doped dielectric disk lasers. Low birefringence heat spreaders can be used intra-cavity without incurring depolarisation losses. Using synthetic diamond intra-cavity provides more efficient thermal management of the laser medium when compared to conventional back-side heat-sinking, enabling significant increases in power scaling to be achieved. The material features consistent, reproducible low-birefringence properties, high thermal conductivity, low absorption, low scatter, wide optical transparency, high laser damage threshold, high chemical and isotopic purity, low thermal expansion, high mechanical stability and chemical inertness.

Optical grade single crystal CVD synthetic diamond, low birefringence, very low absorption
Element Six has developed a special optical grade CVD single crystal synthetic diamond material particularly suited for the most demanding optical applications, such as Raman laser applications. This material provides an unparalleled combination of low birefringence and low optical absorption over long optical path lengths (up to 15 mm), making it the material of choice for certain low loss intra-cavity applications. Combining these properties with its excellent thermal conductivity and low thermal coefficient of expansion, allows much greater power scaling compared to more typical Raman gain media. As synthetic diamond has the highest Raman shift (1332 cm-1) and Raman gain coefficient (25cm/GW) of any material, Element Six Raman grade™ synthetic diamond opens up the possibility of obtaining high power output from a synthetic diamond Raman laser in spectral regions not well-serviced by existing laser sources.

Customised single crystal synthetic diamond products
Element Six is also able to manufacture conductive boron doped single crystal synthetic diamond, and layered and complex structures of different synthetic diamond grades for specialist applications. These are useful in applications such as detectors and electrochemical sensors. We are actively seeking partners to exploit commercial opportunities for such single crystal synthetic diamond structures and the devices they enable.