Is the thermal resistance of the heat-dissipating silicone pad important?

People install a radiator above the heat source to conduct heat from the heat source to the radiator to reduce the temperature. However, there are gaps between the heat source and the radiator, and the air between the gaps will hinder the heat conduction, thereby reducing the heat conduction. Therefore, people need to fill the heat transfer material between the heat sink and the heat source, eliminate the air between the interface, reduce the contact thermal resistance, improve the conductivity between the heat source and the heat sink, and improve the heat conduction effect.

Heat-dissipating silicone pad is a kind of gap-filling thermal pad made of silicone resin as the base material and added with temperature-resistant and thermally conductive materials. It has the characteristics of high thermal conductivity, low thermal resistance, insulation, compressibility, etc., because of its The softer hardness makes it possible to realize a smaller thermal resistance under low pressure conditions, and at the same time eliminates the air between the contact surfaces and fully fills the rough surface between the contact surfaces to improve the heat conduction effect of the contact surfaces. Because of the good filling effect of the heat-dissipating silicon rubber pad, it can effectively conduct the heat of the heat source to the shell, and the heat-dissipating silicon rubber pad has good compressibility and elasticity, which can serve as a shock-absorbing pad.

Thermal conductivity is a parameter to measure the thermal conductivity of a material. It is also a parameter that most people consider when purchasing a heat-dissipating silicone pad. However, the thermal resistance value of the heat-dissipating silicone pad is also very important, and its level will affect the thermal conductivity of the heat-dissipating silicone pad. , Because the higher the thermal resistance, the greater the resistance to heat passing through the heat-dissipating silicone pad, and the less ideal the thermal conductivity. This is why there are two types of heat-dissipating silicone pads with the same thermal resistance and the same other parameters. The thermal resistance is small. The heat conduction effect is better.