Multilayer PCB substrate is a widely used technology in modern electronic devices. Multilayer wiring can provide higher signal transmission capability than single-layer wiring, which means that more circuit functions can be achieved in a smaller space.
1, Land and power plan
In multi-layer PCB design, placing the ground and power layers is crucial. The ground plane and power plane can serve as antennas to prevent interference from other signals. In addition, the widespread distribution of ground and power sources can also ensure the stability and reliability of voltage and signals in the circuit. To ensure continuity between the ground and power plane, it is best to use connection holes arranged through connections in the PCB board.
2, Design wiring rules
The normal operation of the circuit also needs to consider the wiring rules of the substrate. In multi-layer PCB design, correct rules should be used to implement the path of signal lines, such as using optimized straight paths instead of curved paths. Wide signal paths should be used to reduce signal noise, and shorter wiring should be used to reduce signal reflection and transmission delay.
3, Analyze heat
When designing multi-layer PCB wiring, it is also necessary to consider whether all components in the current circuit will generate heat. At this time, rules related to maintaining good ventilation, heat dissipation, and heat dissipation should be followed. Promote the effective dissipation of all heat on the carrier to ensure that circuit components can operate in an efficient manner.
4, Avoid interruptions and bends
In multi-layer PCB board design, circuit lines should be as straight as possible and should not be bent or interrupted. Any improper raised plane will first cause deformation of the board surface, followed by impact failure. Then, interrupting the circuit can easily lead to blockage, causing the circuit to malfunction.
5, Heat resistance
In the design of multi-layer PCB strips, it is necessary to consider the influence of materials and atmospheres of various components (such as capacitors, resistors, inductors) on them. For equipment that must be operated in high-temperature environments, such as communication equipment or industrial equipment, high-temperature resistant materials and components must be used to ensure the stability of the circuit board. These components should be able to withstand high temperatures and not be damaged by acid, alkali, or other corrosive substances.