Introduction For Overall Process And Key Points Of PCB Project

To be a person to have a big picture, PCB design is the same. Before starting a PCB project, designers should understand the overall flow of the project from start to finish, as well as the key points that need to be paid special attention to during the project’s operation. Next, let’s share the process of PCB project.

 

1. At the beginning of the project, it is necessary to check whether all the materials required by the project are complete, including a schematic diagram, a structure diagram, packaging library, signal flow diagram of complex products, power tree diagram, key signal description, power supply current, design requirements, etc.

 

2. Design information input: including network list and structure drawing import.

After the structure drawing is imported, special attention should be paid to the size of the screw holes and some positioning holes, the forbidden cloth area of the device and the wiring, the height limit area, and the position of the connector.

 

3. Layout: on the basis of comprehensive consideration of signal quality, EMC, thermal design, DFM, DFT, structure, safety regulations, and other requirements, the device should be reasonably placed on the board.

In addition to the limitation of structure, the basic idea of the layout is to combine the signal flow direction and the power flow direction to the layout.

 

4. Wiring constraints: Wiring constraints are mainly divided into line width, spacing, equip length, etc.

Some of the rules need to be guided by pre-stimulation, such as line length, impedance, topology, stack structure, etc.

 

5. Wiring: Wiring is a link with the largest workload in PCB design, and there are many points that need to be paid attention to.

Such as line impedance, reference surface continuity, EMC, SI/PI, DFM, etc.

 

6. Review + post-simulation verification: after wiring is completed, senior staff of the department is required to review and check as well as simulation of key signals and power supply.

 

7. Manufacturing processing: PCB design is no problem, you can output the light drawing file for production.