With the in-depth exploration of the field of thermal management, people have come to understand why the thermal conductivity efficiency of heat sinks used to be low. Previous heat dissipation systems conducted heat through direct contact between the heat sink and power consuming components. However, such a heat dissipation system has a problem: there are gaps between the heat sink and power consuming components, and the surfaces of the two are not smooth and flat, making it difficult for heat to effectively pass through the surface of the heat sink.
People have developed thermal conductive materials suitable for filling interfaces based on this situation. These materials are collectively referred to as thermal conductive interface materials. Thermal conductive silicone film, as a widely used thermal conductive interface material, has been applied in various industries. So, what kind of thermal conductive interface material is thermal conductive silicone film?
Thermal conductive silicone pad is a gap filling thermal pad made of silicone resin as the substrate and added with temperature resistant and thermal conductive materials. It has high thermal conductivity, low interface thermal resistance, insulation, compressibility and other characteristics. Due to its soft hardness, it can realize small thermal resistance under low pressure, while eliminating air between contact surfaces and fully filling the rough surfaces between contact surfaces, improving the thermal conductivity of contact surfaces. Due to the excellent filling effect of the thermal conductive silicone sheet, it can effectively transfer the heat from the heat source to the shell, and the thermal conductive silicone sheet has good compressibility and elasticity, which can serve as a good shock absorber pad.
When people search for thermal conductive silicone film online or offline, they have a clear goal of how much W of thermal conductive silicone film they need, because in their view, the performance of thermal conductive silicone film determines the parameter of thermal conductivity. In fact, this statement may not be entirely correct, but it is not without reason.
Thermal conductive silicone film has many parameters, such as hardness, compression ratio, thermal conductivity, temperature range it can withstand, and thermal resistance. In fact, in addition to thermal conductivity, thermal resistance is also related to the actual performance of thermal conductive silicone film. Thermal resistance is the temperature difference formed at both ends of an object when heat flow passes through it. In the field of thermal management, thermal resistance reflects the ability of thermal conductive materials to hinder heat conduction. The larger the thermal resistance of thermal conductive materials, the stronger their ability to hinder heat conduction. Therefore, thermal resistance is a key parameter that affects thermal conductivity performance.
So how should we choose thermal conductive silicone film? Should we focus on the thermal conductivity of the thermal conductive silicone film or its thermal resistance value? In fact, the thermal conductivity of thermal conductive silicone film directly indicates its thermal conductivity, because the higher the thermal conductivity of the thermal conductive material, the better its thermal conductivity. However, for two thermal conductive silicone films with the same thermal conductivity, the lower the thermal resistance, the better the thermal conductivity of the film. Therefore, the thermal conductivity and thermal resistance values of thermal conductive silicone film play a decisive role in its thermal conductivity, and it can be said that both are important.