Copper circuit boards, with their excellent conductivity and mechanical properties, have become an indispensable basic material in modern electronic industry. Copper circuit boards are widely used in various electronic and communication devices, playing an important role in supporting electronic components and achieving electrical connections.

　　The main materials of copper circuit boards include copper foil, substrate, and adhesive. Copper foil, as a conductive material, is used to make circuit patterns. The substrate serves as the support body and is usually made of glass fiber reinforced epoxy resin board, which has good insulation and heat resistance. Adhesive is used to bond copper foil and substrate together, ensuring the mechanical strength and electrical performance of the circuit board.

　　The key performance indicators of copper circuit boards include heat resistance, chemical resistance, dielectric constant, and mechanical strength. These indicators directly affect the reliability and service life of circuit boards. In order to meet different application requirements, copper circuit boards can also be stacked in multiple layers to form multi-layer circuit boards, further improving the integration and functional complexity of the circuit.