The smart router is based on an open system and supports application installation, such as network acceleration, overturning the wall, advertising filtering, NFC, etc. Some smart routers are also equipped with large-capacity hard drives or support external SD cards, which can be used as storage devices. In short, the smart router has become a small computer. With the increase of product functions, the heat dissipation of the device will become a very severe test for engineers (increased heating components, increased power consumption, and compact structure). The requirements for thermal conductivity materials will also increase. The more diverse.