PCB layout design rules check?

　　(1) Whether the distance between wire and wire, wire and component pad, wire and through hole, component pad and through hole, through hole and through hole is reasonable, and whether it meets the production requirements.

　　(2) Whether the width of the power line and the ground line is appropriate, whether the power supply and the ground line are tightly coupled (low wave impedance), and whether there is a place in the PCB board where the ground line can be widened.

　　(3) Whether the best measures are taken for the key signal lines, such as the shortest length, the protection line, the input line and the output line are clearly separated.

　　(4) Whether the analog circuit and the digital circuit part have their own independent ground lines.

　　(5) Whether the graphics (such as ICONS, marking) added to the PCB board will cause signal short circuit. Modify some undesirable lines.