What Is Thermal Silicone Pad?

What Is Thermal Silicone Pad?

In the field of intelligent manufacturing, electronic instruments and meters such as transistors, automotive electronic components, power modules, printer heads, etc., need to pay special attention to the problem of heat conduction and heat dissipation during use, and thermal conductive silicone pad can solve this problem. So what is a thermal silicone pad? What are the characteristics of silicone thermal pad? Where is the thermal pad used? Let’s take a look together!

Definition of Thermal Silicone Pad

Thermal Silicone Pad is a kind of thermally conductive medium material synthesized by a special process by adding organic silica gel as the base material and adding various auxiliary materials such as metal oxides; in the industry, it is also known as thermal conductive silicone pad, thermal conductive silicone sheet, thermal conductive pad , thermal conductive silicone gaskets, etc., are specially produced for the design scheme of using gaps to transfer heat. They can fill gaps, open up the heat channel between the heat-generating part and the heat-dissipating part, effectively improve the heat transfer efficiency, and also play a role in insulation and shock absorption. , sealing and other functions, can meet the design requirements of equipment miniaturization and ultra-thin, it is extremely manufacturable and practical, and has a wide range of thicknesses, an excellent thermal conductive filling material.

Advantages of Thermal Silicone Pad

  1. The material is soft, the compression performance is good, the thermal conductivity and insulation performance are good, and the thickness can be adjusted in a relatively large range, suitable for filling the cavity, with natural viscosity on both sides, and strong operability and maintainability;
  2. The main purpose of selecting the thermal interface material is to reduce the contact thermal resistance between the surface of the heat source and the contact surface of the heat sink, and the thermally conductive silicone pad can fill the gap between the contact surfaces well;
  3. Since air is a poor conductor of heat, it will seriously hinder the transfer of heat between the contact surfaces, and installing a thermal silicone sheet between the heat source and the radiator can squeeze the air out of the contact surface;
  4. With the addition of thermal conductive silica gel pad, the contact surface between the heat source and the radiator can be better and fully contacted, so as to truly achieve face-to-face contact. The reaction at temperature can reach as small a temperature difference as possible;
  5. The thermal conductivity of the thermal gap filler is adjustable, and the thermal conductivity is better;
  6. The structural process difference of the thermal pad is bridged to reduce the process tolerance requirements of the radiator and heat dissipation structural parts;
  7. The thermal pad has insulating properties (this feature needs to be added with appropriate materials during production);
  8. The thermal silicone pad has the effect of shock absorption and sound absorption;
  9. The thermal silica pad has the convenience of installation, testing and reusability.

Disadvantages of Thermal Silicone Pad

Compared with thermal grease, thermal pad has the following disadvantages:

  1. Although the thermal conductivity is higher than that of thermal grease, the thermal resistance is also higher than that of silica thermal pad.
  2. The thermal silicone pad with a thickness of less than 0.5mm has a complex process and relatively high thermal resistance;
  3. The thermal grease has a larger temperature resistance range. They are thermal grease -60°C to 300°C, thermal silicone pad -50°C to 220°C;
  4. Price: Thermal grease has been widely used, and the price is relatively low. Thermal silicone pads are mostly used in thin, small and precise electronic products such as notebook computers, and the price is slightly higher.

Thermal Silicone Pad Application

  1. TFT-LCD notebook computer, computer host.
  2. High-power LED lighting, high-power LED spotlights, street lamps, fluorescent lamps, etc.
  3. Power devices (power supply, computer, telecommunications), automotive electronic modules (engine wiper) power modules, high-power power supplies, calculator applications (CPU, GPU, USICS, hard drives) and any place that needs to be filled with heat dissipation .
  4. Close contact between heating power devices (integrated circuits, power tubes, thyristors, transformers, etc.) used in electronic products and electronic equipment and heat dissipation facilities (heat sinks, aluminum casings, etc.) to achieve better thermal conductivity . Thermally conductive silicone insulating sheet.
  5. Thermal silicone pad is used for control motherboards of electronic and electrical products, inner and outer pads and foot pads of motors, electronic appliances, automotive machinery, computer mainframes, notebook computers, DVD, VCD and any materials that need to be filled and heat dissipation modules .

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