Printed circuit boards (PCBs) are an indispensable part of modern electronic devices, and copper plays a crucial role in them. Copper circuit board, as the name suggests, is a circuit board that uses copper as a conductive material. Copper, due to its excellent conductivity and ductility, has become an ideal choice for making circuit boards.

　　During the manufacturing process, copper is plated on a substrate and then circuit patterns are formed through photolithography and etching processes. These copper wires are responsible for connecting various electronic components, allowing the current to flow smoothly. The high conductivity of copper means that circuit boards can achieve efficient electrical connections in a small space, thereby reducing resistance and energy loss.

　　In addition, copper also has good corrosion resistance and oxidation resistance, which enables copper circuit boards to maintain stable performance in various harsh environments. Copper can ensure the long-term reliability of circuit boards in high, low, and humid environments.