CDT-1000 Thermal Grade Diamond Films
CVD diamond film heat spreaders with thermal conductivity above 1000 W/m·K for laser diodes and multi-chip modules.
Overview
The thermal conductivity of diamond is 1000 to 2000 W/m·K, the highest among all materials and 3 to 5 times that of copper. Meanwhile, diamond has a small thermal expansion coefficient, so it can largely improve heat radiating efficiency by depositing diamond films on common heat sink materials such as Cu and Mo. High-power laser diodes and MCMs (multi-chip three-dimensional assembly technology) are the two main thermal application fields of CVD diamond films.
In this field, the performance of existing heat sink materials cannot compete with that of diamond films. The thermal conductivity of moderate heat sink diamond films can achieve 2 to 3 times that of Cu at room temperature, which is much higher than materials used at present such as AlN, Cu-W alloy, Al2O3 and BeO. It is only inferior to natural IIa and high-quality Ib single crystal diamond synthesized under high pressure.
Typical specification of CDT-1000 diamond film heat spreader
| Property | Value |
|---|---|
| Thermal conductivity (W/m·K) | > 1000 |
| Surface roughness (Ra, nm) | < 200 |
| Surface flatness (μm/mm) | 0.5 |
| Thickness (μm) | 200, 300, 500 |
| Length of side (mm) | 0.5 – 50 |
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