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special positioning Aluminum nitride ceramic substrate

Aluminium nitride polycrystalline materials have a thermal conductivity of 70~210 W / (m.k), while single crystals can be as high as 275 W / (m.k) or more, which is five times higher than that of alumina.
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Aluminium nitride has a very high thermal conductivity compared to most ceramics. 

In fact, AlN has one of the highest thermal conductivities of any ceramic, second only to beryllium oxide. For single-crystal AlN, this value can be as high as 285 W/(m-K). However, for polycrystalline materials, values in the range of 70-210 W/(m-K) are more common.

Uses of aluminium nitride:

Heat Sinks and Heat Sinks
Laser electrical insulators
Chucks, clamping rings for semiconductor processing equipment
Electrical insulators
Silicon wafer handling
Substrates and insulators for microelectronic and optoelectronic devices
Electronic packaging substrates

Chip carriers for sensors and detectors

Small Chips


Laser Thermal Management Components

Molten Metal Fixtures

Packaging for microwave devices

Properties Of Aluminum Nitride Ceramics

Item Data Unit
Color Grey -
Density 3.30 g/cm3
Surface roughness Ra 0.01~0.7 um
Bending Strength 450 MPa
Moh's hardness 8 -
Thermal conductivity 180 25°C,W/(m·k)
Coefficient of Thermal Expansion 4 10-6/°C,100°C
Dielectric Constant 8.8 1MHz
Dielectric loss <3 1MHz,10-4
Electrical Resistivity >1014 25°C,Ω.cm
Dielectric strength 17 KV/mm

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