PCB News - PCB design project check list

1. Check the rationality and correctness of the schematic diagram;

2. Check the correctness of the component package of the schematic diagram;

3. The distance between strong and weak current, the distance between isolated areas;

4. Check the schematic diagram and PCB diagram correspondingly to prevent the loss of the network table;

5. Whether the package of the component is consistent with the actual product;

6. Whether the placement of the components is appropriate:

A. Whether the components are easy to install and remove;

B. Whether the temperature-sensitive element is too close to the heating element;

C. Whether the distance and direction of the components that can generate mutual inductance are appropriate;

D. Whether the placement between the connectors is smooth;

E. Easy to plug and unplug;

F. Input and output;

G. Strong current and weak current;

H. Whether digital and analog are interlaced;

I. Arrangement of elements on the upwind side and downwind side;

7. Whether the directional component has been wrongly flipped instead of rotated;

8. Whether the mounting holes of the component pins are suitable and whether it is easy to insert;

9. Check whether the empty pin of each component is normal and whether it is a missing wire;

10. Check whether there are via holes in the upper and lower layers of the same net table, and the pads are connected through the holes to prevent disconnection and ensure the integrity of the circuit;

11. Check whether the upper and lower characters are placed correctly and reasonably. Don't put components to cover the characters, so as to facilitate the operation of welding or maintenance personnel;

12. The very important connection of the upper and lower layers should not only be connected with the pads of the in-line components, it is best to use vias;

13. The arrangement of power and signal wires in the socket should ensure signal integrity and anti-interference;

14. Pay attention to the proper ratio of pad and solder hole;

15. The plugs should be placed on the edge of the PCB board as much as possible and easy to operate;

16. Check whether the component label matches the component, and the components should be placed in the same direction as possible and placed neatly;

17. In the case of not violating the design rules, the power and ground wires should be as thick as possible;

18. Under normal circumstances, the upper layer shall be horizontal and the lower layer shall be vertical, and the chamfer shall not be less than 90 degrees;

19. Whether the size and distribution of the mounting holes on the PCB are appropriate, and minimize the PCB bending stress;

20. Pay attention to the height distribution of the components on the PCB and the shape and size of the PCB to ensure easy assembly;

The above is the introduction of the PCB design project check list. Ipcb also provides PCB manufacturers and PCB manufacturing technology.