Uncover the ”hardcore indicators“ of CSMH High Quality Single Crystal Diamond!

Single crystal diamond possesses various important properties, including low thermal expansion coefficient, known highest thermal conductivity, chemical inertness, wear resistance, low friction, optical transmittance from ultraviolet (UV) to far infrared (IR), unparalleled electronic properties, etc. CSMH focuses on the homogeneous and heterogeneous epitaxial growth of MPCVD single crystal diamond, and through continuous technological innovation, leads the application revolution of single crystal diamond in the high-tech industry.

Single crystal diamond - thermal grade

Single crystal diamond has extremely high thermal conductivity, up to 2000W/(m · K). By combining various metallized films, it can achieve lower power consumption, higher power density, and longer service life in chip packaging and industrial equipment. In addition, the surface roughness Ra<1nm (measured by AFM and white light interferometers) of MPCVD single crystal diamond wafers can be bonded with GaN, Si, GaAs, InP and other wafers to prepare heterogeneous integrated diamond based composite substrates, promoting the upgrading of advanced packaging technology. 

AFM detection data

Rq 0.199 nm   Ra 0.131 nm

White light interferometer detection data

Sa  0.676 nm  Ra  0.591 nm

Single crystal diamond - optical grade

High quality single crystal diamond synthesized by MPCVD is colorless and transparent, with almost no impurities. It has the widest transmittance spectrum, ranging from 225nm in ultraviolet to 25 μ m in infrared (excluding wavelengths of 1.8 μ m-2.5 μ m), as well as excellent transmittance in X-ray and microwave ranges, with a transmittance of over 70%.

Infrared band transmittance detectiont data

Detection data of refractive index in the UV visible wavelength range

Detection data of transmittance in the ultraviolet visible light band

Detection data of reflectance in the ultraviolet visible light band

Single crystal diamond - electronic grade

Diamond, in addition to its bandgap width (5.5 eV), has inherent high carrier mobility, high breakdown electric field, and high thermal conductivity. Its excellent electrical properties bear the enormous expectations of humans for diamond as the "ultimate semiconductor". The X-ray swing curve half width of CSMH single crystal diamond is less than 100 arcsec, with a dislocation density of less than 1.3 × 10 6/cm2 and a N content of less than 50 ppb. The extremely low dislocation density and nitrogen content can help with subsequent doping and the preparation of diamond devices, ensuring excellent performance of the material in applications.

X-ray Swing curve half width    80.9 arcsec

EPR（Paramagnetic Resonance ） Detection data    N concentration 32ppb

Single crystal diamond - Other characteristics

 In addition to excellent thermal, optical, and electrical properties, single crystal diamond also has extremely high hardness, wear resistance, chemical inertness, etc. Quantum level single crystal diamond is considered a highly promising quantum bit carrier due to its unique nitrogen vacancy color center, which is applied in fields such as quantum precision measurement, quantum computing, and quantum communication.

CSMH is at the forefront of single crystal diamond technology with strong technological innovation accumulation, and its core technology is at the leading level in China. With the in-depth research and technological progress of single crystal diamond, its application fields continue to expand. CSMH is willing to collaborate with customers to jointly promote the wider application of single crystal diamond.