1. The multi-layer PCB board has good sampling quality and strong wear resistance. The surface of the PCB board sample is clearly and aesthetically pleasing, and can be marked with various logos, patterns, QR codes, and text. The patterns are directly engraved on the material, which highlights the wear resistance;

　　2. High machining accuracy. The minimum spot diameter of the laser beam emitted by the laser can reach 10um (UV laser) after being focused, which is of great help in processing complex graphics and precision machining;

　　3. High efficiency, simple operation, and cost reduction. Users only need to set the parameters on the computer to directly mark the material surface, which can be completed in just a few seconds to more than ten seconds;

　　4. Non destructive marking. Laser marking adopts non-contact processing, and the laser head does not need to contact the surface of the material, so there is no need to consider damage to the material;

　　5. Wide range of use, safe and environmentally friendly. Various thin metal/non-metallic materials can be marked;

　　6. Stable performance and long equipment service life. With the development of technology, the service life of lasers has significantly increased, and the service life of equipment has been greatly extended.

　　In the laser marking application of PCB boards, the most commonly used are UV laser marking and CO2 laser marking. UV laser marking and CO2 laser marking have become the first technologies for surface marking of PCB boards due to their small thermal impact, good processing effect, high accuracy, and fast speed.

　　The use of laser engraving QR code technology in the PCB industry can achieve traceability of PCB production, process, and quality, and achieve automated and intelligent management requirements, meeting the needs of lean production, quality control, and process improvement. Marking QR codes on the surface of PCBs is a common requirement for mid to high end customers and has been widely used.

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