Thermally conductive silicone film is present in the form of a filler in contact between the processor and the heat sink to accomplish its important mission - to transfer heat. Is it better to have a thin or thick thermal conductive silicone film? Does thickness affect the performance of thermal conductive silicone film? To understand this issue, first we need to understand the relationship between thermal conductivity, thermal conductivity, and thermal resistance through the Fourier equation: Q=KA△T/d, R=A△T/Q, Q: heat, K: thermal conductivity, W/mk A: contact area d: heat transfer distance △T: temperature difference R: thermal resistance Thermal conductivity K is a fixed performance parameter of thermal conductive silicone film itself, which is used to describe the thermal conductivity of thermal conductive silicone film. capability. This characteristic has nothing to do with the size, shape, or thickness of the material itself, but only with the composition of the thermal conductive silicone film itself. Therefore, the thermal conductivity of similar materials is the same, and does not vary depending on the thickness. By combining the above two formulas, we can obtain K=d/R. Thermal conductivity K is an inherent performance parameter of the material itself, and the value of k remains unchanged, so we can see that the thermal resistance R is proportional to the thickness d of the material. That is to say, the thicker the thermal conductive silicone film, the greater the thermal resistance.

In general, the following conclusions can be drawn: a. For the same material, the thermal conductivity is a constant value, and the thermal resistance value changes with thickness.    b. For the same material, the greater the thickness, the greater the distance the heat has to travel through the material, the more time it takes, and the less effective it is.   c. For thermal conductive silicone film, choosing the right thermal conductivity and thickness has a great impact on the performance. Choose the thermal conductivity of very high thermal conductive silicone film, not only the thickness is very large, and the performance is not good enough. The most ideal choice is: high thermal conductivity, thin thickness, and perfect contact pressure to ensure the best interface contact.