Why need to use thermal grease for device heat dissipation?

When assembling a computer, people will apply a layer of thermal grease on the CPU before installing the cooling fan, and then install the cooling fan. However, there is a large amount of non-contact area between the contact piece of the cooling fan and the surface of the heat source, which results in resistance to heat transfer, thereby reducing heat dissipation modification.

Thermal grease is a popular one in the field of thermal interface materials. Thermal grease is a semi-fluid paste compound based on silicone oil. It has high thermal conductivity, low thermal resistance, and excellent interface lubrication performance. A very thin interface layer is formed on the rough interface, which is easy to be reworked. It is often used to fill the gap between the power dissipation electronic component and the radiator to improve the thermal conductivity of the radiator. It is generally applicable to the current industrial process field.

The contact surface between the heat sink and the heat sink is not always smooth and flat. The thermal grease is filled between the two, which can effectively fill the gap between the interfaces than the thermal pad, which greatly reduces the contact thermal resistance between the heat source and the heat sink. , Thermal grease is very convenient to use and can be reworked, both manpower and machine can operate.