I N FR AR E D C V D D IA M O N D S U B S T R ATE S
www.iiviinfrared.com
I N FR AR E D C V D D IA M O N D S U B S T R ATE S
www.iiviinfrared.com
II-VI Infrared is pleased to introduce its new line of chemical vapor deposition (CVD) diamond substrates for the infrared optics (IR) market. For more than 20 years, II-VI has been producing CVD zinc selenide (ZnSe) and zinc sulfide (ZnS) for IR optical applications. Our expertise in CVD crystal growth accelerated the development program for synthesizing high quality CVD diamond material tailored specifically for optical applications.
CVD DIAMOND SUBSTRATES
Material Properties
Physical PropertiesStructure cubic, polycrystalline
Density 3.51 g/cm3
Electrical Density consult our technical staff
Dielectric Constant consult our technical staff
Optical PropertiesBulk Absorption Coefficient @ 10.6 µm 0.12/cm
Refractive Index @ 10.6 µm 2.38
Temperature Change of Refractive Index @ 10.6 µm 9.6 x 10-6/°C
Thermal PropertiesThermal Conductivity @ 20°C 20 W/cm•K
Specific Heat 0.509 J/g°C
Linear Expansion Coefficient @ 20°C 1.0 x 10-6/°C
Mechanical PropertiesYoung’s Modulus 1220 GPa
Rupture Modulus 200-1000 MPa
Knoop Hardness 85-100 GPa
Poisson’s Ratio 0.10-0.29
Fracture Toughness 5-7 MPa √m
Applications include:
• CO2 Laser Windows (10.6 Microns) – High Power Industrial Lasers • HighPowerMicrowaveWindows – Gyrotrons, Fusion Reactors – Radar, Directed Energy Weapons • ThermalManagement – Heat Sinks
Extreme Hardness Scratch Resistant
Highest Thermal Conductivity Five Times Better Than Copper
Low Thermal ExpansionCoefficient
Resistant to Thermal Shock
Transparent Over Wide Range Deep UVFar InfraredMicrowave
Chemically Inert DurableBiocompatible
Unique Properties
2-3
I N FR AR E D C V D D IA M O N D S U B S T R ATE S
www.iiviinfrared.com
I N FR AR E D C V D D IA M O N D S U B S T R ATE S
www.iiviinfrared.com
T (ºC) k (W/m K)
0 2190100 1560200 1170300 940400 790500 700
500
1000
1500
2000
2500
0 100 200 300 400 500
Wavelength(µm)
0.22 2.7220.35 2.4880.56 2.4210.89 2.3961.41 2.3872.25 2.3833.56 2.3815.65 2.3818.95 2.38114.1 2.38022.5 2.38025.2 2.380
Index
Index of Refraction
ThermalConductivity
6=>7: :9=E96=>7< :9=:FD6=>79 :9=<?9
6=>E :9=9?D6=>EE :D=6<F6=>E: :D=E:E6=>E< :D=:6D6=>E9 :D=?9:
6=>> :D=F:96=>>E :D=D6=>>: ?6=6>96=>>< ?6=E7?
0
10
20
30
40
50
60
70
80
0 2 4 6 8 10 12 14 16 18 20
Tran
smis
sion
(%)
Wavelength (µm)
Transmission of Optical CVD Diamond(uncoated, thickness 981 µm)
2.35
2.40
2.45
2.50
2.55
2.60
2.65
2.70
2.75
0 2 20
n
(µm)
W O R L D W I D E S A L E S O F F I C E S
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