Vacuum Optics Catalogue - March 2022

CVD Diamond
Specification
Tolerance of Thickness: ±25 µm
Flatness:
Thermal Conductivity:
<4 µm/cm
Density: 3.5 g/cm 3
Young’s Modulus:
Growth Side
Surface Finish:
Nucleation Side
Surface Finish:
Polished:
Raw Thickness:
Polished Thickness:
Up to 1800 W/mK
(1000 - 1500 W/mK typical)
1.22 Gpa
<100 nm Ra
<30 nm Ra
Standard Sizes
Up to diameter 65 mm
Between 0.3 mm and 1.5 mm
Between 0.2 mm and 1.0 mm
Special sizes and thickness are available on request
CVD Diamond
Natural diamond has always been of extreme scientific interest due to its unmatched properties including
hardness, thermal conductivity, broadband transparency, chemical inertness and high temperature
stability. However, the cost of natural diamond substrates is prohibitive in most cases. In the
last two decades CVD processes have been developed to the point where economical artificial diamond
substrates are now readily available. Torr Scientific is offering CVD diamond substrates in various
shapes for use in applications such as thermal mounts and laser windows as well as sealed into vacuum
viewports assemblies for high vacuum applications.
Transmission Curve - CVD Diamond
HEBEI DIAMOND CURVES
90.0%
80.0%
OPTICAL & X-RAY GRADES
70.0%
OPTICAL GRADE
TRANSMISSION %
60.0%
50.0%
40.0%
X-RAY GRADE
30.0%
20.0%
10.0%
0.0%
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
Wavelength (nm)
1500
1600
1700
1800
1900
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Wavelength (microns)
20
21
22
23
24
25
Please note that the optical transmission curves are approximations and should be used for reference only
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