How to check whether the drawing wiring in the PCB circuit board design is correct?

After the wiring of the PCB circuit board is completed, the design rule inspection of the circuit board is required to ensure whether the circuit board design scheme meets the requirements and whether all the networks are properly connected. Common new inspection items in PCB design scheme rule inspection are as follows:

1. Whether the distances between wires and wires, wires and components, wires and pads, components and through holes, and pads and pads are valid, and whether the manufacturing regulations are considered.

2. Change some unsatisfactory wiring.

3. Whether there is a separate ground wire for digital integrated circuits and digital circuit designs.

4. Whether the patterns (such as marks and labels) added to the PCB will cause short-circuit failure of the data signal.

5. Whether the boundary of the geological structure of the switching power supply in the double-layer circuit board becomes smaller, such as the exposed copper of the geological structure of the switching power supply, it is very easy to cause a short circuit fault.

6. Whether the total width of the power plug and the ground wire is appropriate, and whether the switching power supply and the ground wire are tightly coupled, first of all, it depends on whether there is an area where the ground wire can be widened.

7. Whether to take the best countermeasures for important power lines, such as the shortest length, increase the maintenance line, whether the input line and output line are obviously separated.

8. Whether there is a processing line on the PCB circuit board, whether the solder mask meets the production process requirements, whether the solder mask specification is appropriate, and whether the mark is pressed on the component solder layer.

The results of the design scheme rule inspection can be divided into two categories: one is the report output, which generates the inspection result table; the other is online inspection, that is, the electrical equipment rules and wiring rules of the circuit board in the whole process of PCB circuit board wiring. checking. The rules of PCB design include electrical equipment rules, wiring rules, reasonable layout rules, high-speed circuit principle rules, signal integrity rules, etc.