Many electronic devices tend to overheat after prolonged use, and the issue often lies in the heat dissipation of the circuit board. So, what methods do engineers use to address this?
 
1. Add heat dissipation holes on the PCB to allow heat to escape through air convection.
2. Thicken the copper foil or expand the copper area to achieve rapid cooling by leveraging the thermal conductivity of metal.
3. Install heat sinks directly to draw away the heat from heat-generating components.
4. Layout is crucial: place high-power components as close to the board edges as possible to shorten the heat dissipation path.
 
These small techniques often determine whether a circuit board can operate stably.