Everyone knows that thermal conductive silicone is used to fill the air gap between heating devices and heat sinks or metal bases. Their flexibility and elasticity make them suitable for covering very uneven surfaces. Heat is conducted from the separation device or the entire PCB to the metal casing or diffusion board, thereby improving the efficiency and service life of the heat generating electronic components.
There are generally two forms of thermal conductive silicone film backing, double-sided backing and single-sided backing. The editor will introduce the advantages and disadvantages of thermal conductive silicone film backing:
1. Advantages and disadvantages of double-sided adhesive for thermal conductive silicone film:
Double sided adhesive tape is mainly used to fix the heat sink and attach the IC to the heat sink without the need for a separate fixing structure, as the product lacks a fixed device or is inconvenient to fix.
The benefits of double-sided adhesive of thermal conductive silicone film: it can be used to fix heat sinks without the need for additional design of fixing structures.
The influence of double-sided adhesive on thermal conductive silicone film: the thermal conductivity effect will deteriorate and the derivative coefficient will be much lower.
2. Advantages and disadvantages of single-sided adhesive for thermal conductive silicone film:
Single sided adhesive is mainly used to facilitate the installation and bonding of thermal conductive silicone. For example, a certain backlight source uses thermal conductive silicone with a size of 452 * 5.5, which is not easy to install. Therefore, single-sided adhesive is used to stick the adhesive side of the thermal conductive silicone on the PCB board and the other side on the shell.
The benefits of single-sided adhesive of thermal conductive silicone film: It can stick to the surface of the heater on one side, and when there is relative sliding of the heat sink or shell during assembly, the thermal conductive silicone film will not produce positional deviation.
The influence of single-sided adhesive on thermal conductive silicone film: The thermal conductivity will decrease, but the effect is better than that of double-sided adhesive.
Based on the analysis above, it can be concluded that providing thermal conductive silicone sheets with both single-sided and double-sided adhesive will result in a decrease in thermal conductivity.