The production process of thermal conductive silicone pads, how to use thermal conductive silicone p

A thermally conductive silicone pad is a thermally conductive medium used to reduce the contact thermal resistance between the surface of the heat source and the contact surface of the heat dissipation device. In the industry, it can also be called thermally conductive silicone sheet, thermally conductive silicone pad, soft heat dissipation pad and so on. Overview of thermally conductive silicone pads:

As electronics continue to pack more powerful features into smaller components, rising temperatures can lead to slower device operation, device failures in the middle of operation, size space constraints, and many other performance issues. As a result, temperature control has become one of the most critical challenges in the design, i.e., how to effectively remove more heat generated by a larger unit of power in a tight architecture with less and less operating space. From an engineering point of view, the flexible thermally conductive silicone sheet is designed to match the irregular surface of the material, using high-performance thermally conductive materials, eliminating air gaps, thereby improving the overall thermal conversion capacity and enabling the device to work at lower temperatures.

Thermally conductive silica gel sheet has a certain flexibility, excellent insulation, compressibility, natural viscosity on the surface, specially produced for the design scheme of using gaps to transfer heat, can fill the gaps, complete the heat transfer between the heating part and the heat dissipation part, and also play the role of insulation, shock absorption, sealing, etc., can meet the design requirements of equipment miniaturization and ultra-thinness, is very manufacturability and use, and the thickness is widely applicable, is an excellent thermal conductive filling material and is widely used in electronic and electrical products.

Thermally conductive silicone pads should be made of a special material. Silicone itself is not thermally conductive. I don't know exactly what the material is.

Thermally conductive silicone pads, also known as thermally conductive silicone pads and soft heat dissipation pads, have good insulation and thermal conductivity, and can be shockproof. It can well realize the heat transfer between the heating and heat dissipation parts, and its thickness makes it very widely used. It can be used as a very good thermal conductive material, mainly on the surface of some irregular parts.

When using thermally conductive silicone pads, they need to be taken into account when designing. At the same time, there are many factors to consider, such as thermal conductivity, mechanism, installation testing, and so on. First of all, the thermal conductivity scheme, the previous thermal conductivity scheme mostly uses some thermal conductive sheets, but in the current design, in addition to the thermal conductive sheets, there are also some thermally conductive components, or cancel the thermal conductive sheets.

Of course, these are not fixed, in the specific implementation process, should be based on the specific requirements, to choose the most cost-effective one.

If you choose the thermal conductive sheet scheme, you need to consider some other factors, such as some protrusions on the surface of the component, avoidance, etc. In the design process, it is necessary to balance the size relationship between the structure and the thermally conductive silica gel sheet. If you can, it's a good idea to make the thermally conductive silicone pad thin enough.

Single-sided glue is more convenient to use, more convenient to operate, more recommended to use, when using, you need to paste the side with glue on the thermal conductive component, if there are conditions, it is recommended to use a good compression ratio of thermal conductive silica gel sheet, because it can give a certain pressure.

When choosing a thermally conductive silica gel sheet, you also need to consider the size of the power consumption and the specific thermal conductivity function of the thermal conductor. If it is a general chip, they are very sensitive to temperature, that is to say, there is a large heat flux density, so they all need to do a thermal conductivity treatment, the most basic also need, if possible, it is best to choose a thermal conductive silica gel sheet with a relatively high thermal conductivity. The maximum temperature of the general chip shall not exceed 85 degrees Celsius during production, and if the surrounding environment is high, it shall generally not exceed 75 degrees.

In such a situation, the thermal conductive silica gel sheet with high conductivity and heat lifting coefficient will naturally be welcomed by the majority of users.

When using thermal conductive silicone sheets, you also need to pay attention to the size of the silica gel sheets, because their specifications are different, of course, the size of this needs to be determined according to the covering heat source, if the size of the selected thermal conductive silica gel sheet is too large, it will not have a good impact on thermal conductivity, and even have a bad effect.

There are many factors to consider in the use of thermally conductive silicone sheets, and you must make a selection according to your budget.

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Thermally conductive silicone pads are actually a kind of thermally conductive medium.

It is used to reduce the contact thermal resistance between the surface of the heat source and the contact surface of the heat dissipation device.

With the continuous progress of society, people's requirements for products are getting higher and higher. Electronic devices are getting smaller and smaller, and the requirements for thermally conductive materials in the process are increasing.

Because the increase in temperature will affect the use of products, as electronic devices become smaller and smaller, the requirements for thermally conductive materials become more and more high. Nowadays, temperature control and achieving the previous or even higher thermal conductivity effect in the case of smaller and smaller space structures have become the current thermal conductive silicone pads that need to be considered.

Thermally conductive silicone can be used in many industries, such as home appliances, air conditioners, microwave ovens, heaters and other electrical appliances that need hot silicone sheets for heat dissipation; In the power supply industry, such as transformers, capacitors, resistors, inductors and other products, as long as they belong to high-power rate components, then thermally conductive silica gel sheets are indispensable to disperse the heat of these components to the shell; In the LED industry, thermally conductive silica gel sheet is also widely used, which can be used to connect the aluminum substrate and heat sink in the cavity LED lamp products to heat dissipation; At the same time, it can also be applied to the PC, such as the south bridge, the north bridge, the motherboard chip, the graphics card chip and other Hengchai shirts need the heat transfer of the thermal conductive silicone sheet.

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1. The hardness of the thermally conductive silicone pad is generally 20-30 degrees. It should have 10-20% compressibility.

2. The color of the thermally conductive silicone pad does not affect the thermal conductivity.

3. Thickness, considering that the product has a certain compressibility, the thickness of the thermally conductive silicone pad should be 1-2mm higher than the actual height.

4. Sticky, thermally conductive silicone pad is a product with a certain viscosity, and if the thermally conductive silicone pad has a certain compressibility, it can be without adhesive. The adhesive will have a certain effect on the thermal conductivity.

5. Do you need to apply thermal grease after adding a thermal conductive silicone pad? This is not needed, silicone grease is suitable for the place where the heat sink and the chip are in direct contact, in order to make the heat sink and the chip fit tightly, improve the effect of heat dissipation, and the thermal conductive silicone pad is used in the kind of place where there is a large gap between the heat sink and the chip, and the single coating of silicone grease cannot make them contact, so the silicone pad will be used, and the silicone pad will not need to be used again, if the silicone grease is used again, the heat dissipation effect will be worse.

It has thermal conductivity, insulation, shockproof performance, soft material and sticky surface (sticky surface), easy to operate, and can be applied to various irregular parts between the surface and radiator, shell, etc. Some thermally conductive silicones are added with glass fiber (or carbon fiber) to increase their mechanical strength.

Limitations: 1Although the surface temperature of the device is reduced, the heat will be dispersed into the surrounding space through the silicon gel sheet, so the temperature of the surrounding device will increase slightly, so only a few devices with high temperatures can be attached to the silica sheet.

2.Due to the different materials, the insulation of some silicone sheets is not ideal, and when there is high voltage (such as 8kV), the silica gel sheet will be turned on, which will affect the EMI characteristics of the device.

It is used in power supply, LCD PDP TV, LED lighting, automotive electronics, optoelectronics, notebook computers and other industries. Peers also use thermal grease to conduct heat.

Here's a comparison of thermal silicone pads and thermal grease:

Thermal conductivity: The thermal conductivity of thermally conductive silicone pads and thermally conductive silicone grease, respectively, and. Insulation: Thermal conductive silicone grease has good insulation performance due to the addition of metal powder, and the thermal conductive silicone pad has good insulation performance. The electrical insulation index of 1mm thickness is above 4000 volts.

Form: Thermal grease is condensation, and thermal silicone pad is sheet.

Use: Thermal grease needs to be applied evenly (in case of large size, it is more inconvenient to apply), which is easy to dirty the surrounding devices and cause short circuits and scratches of electronic components; The thermally conductive silicone pad can be cut arbitrarily, and the protective film can be torn off and directly pasted, with a small tolerance, clean, and labor cost saving.

Thickness: As a thermally conductive material for filling gaps, thermal grease is limited, and the thickness of thermally conductive silicone pads is never equal, and the application range is wide.

Thermal conductivity: Thermal grease with the same thermal conductivity is better than soft silicone thermal sheet, because the thermal resistance of thermal grease is small. Therefore, in order to achieve the same thermal conductivity, the thermal conductivity of the thermal conductive silicone pad must be higher than that of thermal grease.

It is easy to reinstall, while it is inconvenient to reapply thermal grease after disassembly.

Thermal grease is widely used and is low. Thermally conductive silicone pads are mostly used in thin and delicate electronic products such as laptops, and ** is slightly higher.