The combination of single-sided PCB and double-sided PCB can form a complex PCB circuit board. PCB multilayer boards with more layers have larger areas for installing electronic components and wiring.

The layers are separated by insulating materials. When engineers optimize the design of PCB boards, each layer has special special functions. The arrangement between layers will not cause problems for other layers. PCB board grounding provides shielding support for signals. In this type of PCB multilayer board, they should not be avoided. Since the circuit can withstand high communication speed, the corresponding grounding layer should be placed at each signal layer. In order to save the final cost and thickness of the whole system, it is best to limit the overlap of layers.

The manufacturing layer of PCB multilayer board manufacturer can be divided into the following contents:

Copper layer: normal signal;

Copper layer: power layer;

Ground layer;

Copper layer: high-speed signal layer;

Copper layer: high-speed signal layer;

Ground layer;

Copper layer: power layer;

Copper layer: normal signal.

The distribution and positioning of each layer produced by the multi-layer PCB manufacturer depends on the specific situation, and the order of each level also depends on the cost that the customer is willing to spend on its project. Either way, PCB designers try to logically separate these layers according to their logical functions. In the production of PCB multilayer board manufacturers, the return wiring or ground electricity is used as a shielding solution.