PCB Design Rule Check (DRC)
After the wiring design is completed, it is necessary to carefully check whether the wiring design conforms to the rules set by the designer. It also needs to confirm whether the rules are in line with the requirements of the PCB production process. The general inspection has the following aspects:
Wire and line, wire and component pad, wire and through hole, component pad and through hole, through hole and through the hole between the reasonable, whether to meet the production requirements.
Is the width of the power and ground lines appropriate and whether the power supply is tightly coupled to the ground (low impedance)? Whether there is a place where the ground can be widened.
For the key signal line whether to take the best measures, such as the shortest length, plus protection lines, input lines and output lines are clearly separated.
Analog circuits and digital circuit parts, whether there is a separate ground.
After the graphics in the PCB (such as icon, marked) will cause the signal short circuit.
Modify some of the unsatisfactory lines.
Is there a process line on the PCB? Whether the resistance to meet the requirements of the production process, resistance to welding size is appropriate, whether the character mark on the device pad, so as not to affect the quality of electronic equipment.
Multilayer board in the power plane of the outer edge of the frame is reduced, such as the power of the formation of copper foil exposed to the board easily lead to short circuit.