Features:
High thermal conductivity, low dielectric constant & loss, good insulation, have a coefficient of thermal expansion similar with silicon (Si), No toxicity.
Application:
1. HBLED
2. optical-communication
3. High-power RF Devices
4. Power Electronic Devices
5. Power Module
6. Special Cooling Device
| Property Index of AlN ceramic substrates | |||
| Property Sort | Property Content | Unit | Property Index |
| Basic Properties | Appearance/color | - | Gray |
| Water absorption | % | 0 | |
| Volume density | g/cm3 | ≥3.30 | |
| Surface roughness, Ra | μm | 0.3-0.5 | |
| Camber | (length‰) | ≤3‰ | |
| Thermal Properties | Thermal conductivity (30ºC) | W/m.k | ≥170 |
|
(20ºC to 300ºC) Thermal expansivity (300ºC to 800ºC) |
×10-6/ºC | 4.4 | |
| ×10-6/ºC | 4.8 | ||
| Mechanical Properties | Flexural strength | MPa | 420 |
| Modulus of elasticity | GPa | 320 | |
| Moh's hardness | - | 8 | |
| Electrical properties | Dielectric constant (1MHz 25ºC) | - | 8.9 |
| Dielectric loss(1MHz 25ºC) | ×10-4 | 2.8 | |
| Dielectric strength | KV/mm | ≥17 | |
| Volume resistivity | Ω.cm | ≥1014 | |