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CVD Diamond Substrate

Specific Information

Diamond can be widely used in some fields such as ultra-precision machining, luxury jewelry, optics, quantum materials, electronic materials and semiconductor devices due to its large bandgap, highest thermal conductivity, low thermal expansion, incredible electrical resistivity, widest optical transparency and other good properties.

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specification
Properties

1. Single-crystal diamond substrate

Item	Single-crystal diamond substrate
Diameter	5*5mm	10*10mm	20*20mm	25.4±0.3mm
Thickness	300~500μm
Surface Orientation	<100>
Growth Method	MPCVD
Surface Finish	Grind,SSP,DSP
Polish roughness(AFM,5*5μm)	1~10nm
Thermal conductivity	1500-2300W/m.K

2. Polycrystalline diamond substrate

Item	Polycrystalline diamond substrate
Diameter	10*10 mm	25.4±0.3mm	50.8±0.5mm	100±0.5mm
Thickness	300~500μm
Growth Method	MPCVD
Surface Finish	Grind,SSP,DSP
Polish roughness(AFM,5*5μm)	1~10nm
Thermal conductivity	1000-2000W/m.K

3. Sample testing data

● AFM surface roughness of single-crystal diamond

● TTV, WARP, BOW, and surface roughness of polycrystalline diamond

4. Customization specifications：

* Various sizes and shapes such as 5*5mm,10*10mm,1~4inch.
* Various thicknesses:0.1~5mm
* Various surface roughness such as slicing,lapping.
* crystal type:single crystal diamond or polycrystalline diamond.

Diamond is the hardest substance in the world and it is gaining more attention for its outstanding optical, electrical, mechanical, and thermal properties. Artificial diamond can be grown by MPCVD.In this process diamond is grown by starting with a carbon containing gas like methane and hydrogen, then carbon atoms are created by high pressure and high temperature,which is responsible for the deposition on the substrates to form diamond single crystal.

Crystal Structure	Cubic
Lattice Constant(nm)	0.3567Å
Density(g/cm³)	3.52
Melting point（℃）	3550
Mohs Hardness(mohs)	10
Dielectric Constant	5.68
Band Gap(eV)	5.47
Breakdown Electrical Field (MV/cm)	10
Thermal Conductivity(W/cm.K)	12-18
Thermal Expansion	3.196*10^-6/k
Refractive Index	2.417

CVD Diamond Substrate

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