The manufacturing process of printed circuit boards involves many links and steps, from the selection of materials to the completion of the final product need to go through a fine process. First of all, choosing the right substrate and conductive material is the key, which determines the quality and performance of the PCB. Next is the circuit design process, through the professional design software to draw the circuit pattern on the substrate. It then proceeds to the platemaking stage, where the circuit pattern is transferred to the film. The etching process is used to remove the unprotected copper layer to form the circuit wire. Subsequent steps such as drilling and welding are used to complete the installation and connection of the components. Each step requires strict quality control and technical operations to ensure the stability and reliability of the final product. It is very important for engineers and technicians to understand and master the whole process of PCB manufacturing.