How to apply cooling graphite film to PCB board?

Radiating graphite film is a very thin GTS, comprehensive thermal conductive material, also known as thermal graphite film, thermal graphite sheet, graphite radiator, etc. The application of heat dissipation graphite film on PCB partly plays the role of heat insulation. On the one hand, it evenly distributes the heat and relieves the local overheating inside the phone. At the same time, it diffuses heat quickly before it reaches the shell, so that it doesn't feel too hot to the user.

In this application, it is necessary to evaluate the amount of heat generated by the heat source, the area of the graphite cooling film and the final target temperature. Because if the heat source is too large, the final rise of the overall temperature of the mobile phone will still be concerned, the increase of the graphite heat dissipation film area on the one hand can increase its heat capacity, so that the temperature rise is controlled in a certain range, but also can increase the heat dissipation area, accelerate the heat dissipation. Such applications can only be used in environments where the heat of the heat source is not too large, such as mobile phones and PA Mingxuan handheld devices. After all, the area of the cooling film is still limited. If the heat is very large, it is difficult to balance the heat of the heat source.

There is a application environment may have nothing to do with the heat itself, because the soft properties of graphite, membrane heat sink needs to have a plane to see attached, that is to say it's basically need to stick on some parts, that is why we in shield, empty PCB board face and the LED substrate see the figure of it, at the same time because of its good electrical conductivity, It can also play a better shielding role. For our products, it is difficult to find an open structural surface to attach the graphite cooling film. If we want to apply it, we need to make a specific design.