For thermal interface materials, the importance of high thermal conductivity is self-evident, and the main purpose of adopting a thermal solution is to reduce thermal resistance to achieve fast heat transfer from the processor to the heat sink.
Among thermal interface materials, サーマルグ and 相変化材料have better gap filling ability (interfacial wetting ability) than thermal pads, and achieve a very thin adhesive layer, thereby providing lower thermal resistance. However, thermal grease tends to be dislocated or expelled over time, resulting in loss of filler and loss of heat dissipation stability.
相変化材料remain solid at room temperature and will only melt when a specified temperature is reached, providing stable protection for electronic devices up to 125°C. In addition, some phase change material formulations can also achieve electrical insulation functions. At the same time, when the phase change material returns to a solid state below the phase transition temperature, it can avoid being expelled and have better stability throughout the lifetime of the device.
