The PCB is composed of heat-resistant and non-insulating materials, including a substrate for dissipating heat and keeping the entire system working efficiently. The top layer of a PCB usually contains conductive materials such as copper, which helps guide electrical signals from one component to another. However, the PCB itself is not a complete structure because it does not contain electronic components.
In contrast, a printed circuit board assembly (PCBA) is a comprehensive unit that contains a PCB and all basic electronic components. This includes connecting electrical components to the PCB to form an operational electronic device. Place the components on the board, weld them, and test them.
