Wireless Charger pcba Circuit Boards

How do you trace a circuit board?

A PCB quality tracking custom pcb fabrication method, including the steps: providing a PCB substrate, the PCB substrate includes multiple product areas and non-product areas, and forming a first identification code in the non-product area of each PCB substrate; in the PCB substrate Multiple product areas form conductive lines; multiple PCB substrates used to make the same multilayer PCB are laminated to obtain a multilayer PCB substrate, and each corresponding product area constitutes a PCB unit, which is formed on the surface of the multilayer PCB substrate A second identification code, the second identification code is associated with the first identification code of multiple circuit board substrates used to make the same multilayer PCB substrate; the third identification code is formed on the surface of each circuit board unit, the same The third identification code of the circuit board unit included in the multi-layer circuit board substrate is associated with the corresponding second identification code; and the multi-layer circuit board substrate is molded to obtain a plurality of separated circuit board units.