All About Sticky Soft Thermal Conductive Silicone Pad

A thermal conductive silicone pad is typically unfilled silicone rubber that has a thermal conductivity of approximately 0.2 W/m•K and even a highly filled silicone elastomer can barely exceed 0.4 W/m•K. Thermal Conductive Silicone Pad is a highly conformable, slightly tacky silicone elastomer pad. Designed to supply heat transfer paths between heat-generating components and heat sinks, heat spreaders, or different cooling devices.

The function of heat transfer medium and also the performance of moisture-proof, dust-proof, corrosion-proof, and shock-proof. Appropriate for microwave communication, microwave transmission equipment, microwave special power supply, stabilized power supply, and different microwave device surface coating or overall potting. Such silicon materials give wonderful thermal conductivity for electronic elements that generate heat.

How thermal pads work

Thermal pads can still lay down nicely on a flat surface. However, there’ll still be very few gaps between the central processing unit and also the thermal pad. These little air gaps can give a slightly lower heat transfer conduction rate as air isn’t pretty much as good at transferring heat.

Pads deliver exceptional shock absorption furthermore as thermal performance. Thermal pads are naturally tacky and their inherent softness adheres to amiss coupling surfaces, preventive micro-air voids at the interface thereby reducing thermal resistance to an absolute minimum. 

Though pads designed as structural adhesives, they need a considerable natural tack once cured that allows gentle adhesion to adjacent parts. Thermal conductive pads provide a cleaner resolution than thermal grease and permit a better dismantlement because of restricted stickiness than thermal glue.

How to use thermal pads

A thermal pad can leave the element with a really close-to-level surface on which to mount the heat sink. In parts that consume far more power, like a superior FPGA or central processing unit, employing a thermal pad or thermal paste isn’t where the controversy ends. You will probably need to add a cooling fan to those parts to make sure the temperature is brought all the way down to an applicable level.

Properties of thermal pads

A thermal pad can become brittle over time after recurrent thermal cycling, at which purpose the heat sinks will break off the element. This has the identical gap-filling capability as thermal paste, however, it’s all the sturdiness of a thermal pad.

Features of Thermal Conductive Silicone Pads

  • Very high thermal conductivity (4.9 W/m-K)
  • Good softness & conformability even to non-flat surfaces.
  • Slight tack allows pre-assembly. 
  • Good dielectric properties.
  • High-temperature resistance.
  • Tacky on both sides.

Applications of Thermal Conductive Silicone Pads

  • Battery Thermal Management.
  • Thermal Gap Pad.
  • LED Lighting Thermal Management.
  • Thermal Interface-Damping-Cushioning.
  • Integrated chip (IC) packaging heat conduction.
  • Heat sink interface.
  • Chip on film (COF) heat conduction.
  • LED board thermal interface material. 

Advantages of the thermally conductive silicone pad

One of the advantages of a thermal conductive silicone pad is that the material is relatively soft and has good softness. It has very natural viscosity and has worth operability & maintainability. The main advantage of selecting a thermally conductive silicone sheet is that it’s a reduced surface and generates thermal contact resistance with the contact surface of the heat sink.

  • Applying thermal paste is a relatively messy process.
  • Thermal Pads are useful to fill bigger gaps.
  • Thermal Pads are custom die-cut to the specification of a certain component for a perfect fit and it is also very easy to install.

Limitations of the thermal conductive silicone pad

The limitation, that one of its thermal conductivity is higher than that of the thermal conductive pad, and its thermal resistance is higher than that of thermal conductive pads. The second is that it’s a thermally conductive silicone sheet whose thickness is usually but 0.5mm. The method is sort of difficult, and therefore the quality is above the thermal resistance.


Most electronic elements generate heat. This can be inevitable and quite normal. Kept below a certain level, the temperature can have very little impact. On the performance or duration of a part or circuit. Thermal Conductive Silicone Pads became important in meeting demands to extend. The performance and scale back the size of electronic assemblies, like power supplies and control units, while not compromising responsibility.


Please enter your comment!
Please enter your name here