After the PCB circuit board wiring is completed, the design rules of the circuit board must be checked to ensure that the circuit board meets the design requirements and all networks are connected correctly. So, how to check the correctness of PCB board drawing design?
1. Whether the distance between lines and lines, lines and component pads, lines and vias, component pads and vias, and vias and vias is reasonable and meets production requirements.
2. Whether to modify some unsatisfactory lines.
3. Whether the analo circuit and the digital circuit part have their own independent ground wires.
4. Whether the graphics (such as icons and labels) added to the PCB board will cause a short circuit of the signal.
5. Whether the outer frame edge of the power ground layer in the multilayer circuit board is reduced.
6. Whether the width of the power line and the ground line is appropriate, whether the power supply and the ground line are tightly coupled, and whether there is a place where the ground line can be widened.
7. Whether the best measures have been taken for the key signal lines, such as the shortest length, adding protection lines, etc.
8. Whether there is a process line on the PCB, whether the solder mask meets the requirements of the production process, whether the size of the solder mask is appropriate, and whether the character mark is pressed on the device pad.
Design drawing inspection results can be divided into two types: one is Report (report) output, which generates a report of inspection results; the other is OnLine inspection, which is to inspect the electrical rules and wiring rules of the circuit board during the wiring process.
