PCB copper laying is the process of filling the unused space on the PCB with solid copper in areas without wiring. The significance of copper laying lies in reducing ground impedance, improving anti-interference ability, and reducing loop area. Copper laying is a very important part of PCB design.

Why do PCBs need to be coated with copper?

1. EMC provides shielding for large areas of ground or power supply copper, and some special measures, such as PGND, provide protection.

2. PCB process requirements. Generally, in order to ensure the electroplating effect or prevent deformation during lamination, copper is laid on PCB layers with less wiring.

3. The requirement for signal integrity is to provide a complete return path for high-frequency digital signals and reduce the wiring of DC networks. Of course, there are also reasons such as heat dissipation, special device installation requirements for copper plating, and so on.

What is the purpose of laying copper in PCB design?

1. Laying copper on PCB can improve the conductivity of the circuit board. Due to the excellent conductivity of copper, covering with copper foil during the manufacturing process of printed circuit boards can greatly improve their conductivity. This can ensure more stable and reliable connections between various components.

2. Copper plating on PCBs can also enhance the mechanical strength and stability of printed circuit boards. Due to its high mechanical strength and stability, copper foil can effectively prevent printed circuit boards from being damaged or deformed by external environmental factors during use.

3. Copper plating on PCBs can also protect the circuit board from oxidation or corrosion. Due to the excellent corrosion resistance of copper foil, coating a layer of copper foil on the surface of circuit boards can effectively protect them from oxidation or corrosion. This can extend the service life of the circuit board and ensure its stability and reliability during use.

In summary, PCB copper plating is a very important step in the manufacturing process of printed circuit boards.