Channel plate, also known as the soaking plate, is usually divided into an upper sheet and a lower sheet, which is similar to the heat pipe technology in principle, but differs in the way of conduction. The heat pipe is one-dimensional linear heat conduction, while the heat in the runner plate is conducted on a two-dimensional surface, so the efficiency is higher. Specifically, after absorbing the heat of the chip, the liquid inside the cavity evaporates and diffuses into the vacuum cavity, conducts the heat to the heat dissipation fins, and then condenses into liquid and returns to the bottom. This kind of evaporation and condensation process similar to the refrigerator air conditioner circulates rapidly in the vacuum chamber to achieve a relatively high heat dissipation efficiency.