PCB multilayer board features

The biggest difference between PCB multilayer boards and single-sided and double-sided boards is that the internal power layer (maintaining the internal electrical layer) and the ground layer are added. The power and ground networks are mainly routed on the power layer. However, the multi-layer board wiring is mainly based on the top layer and the bottom layer, supplemented by the middle wiring layer. Therefore, the design of the multi-layer board is basically the same as that of the double-sided board. The key lies in how to optimize the wiring of the inner electrical layer, so that the wiring of the circuit board is more reasonable and the electromagnetic compatibility is better.