UV lasers affect the quality of the QR code of the engraved PCB circuit board

In the field of PCB circuit board electronics, QR codes can play a role in product quality traceability and product source traceability, and can effectively control product materials, reject defective products, provide product replenishment and other good points.

In the early days, ink was used to QR codes, but this method is easy to wipe off with alcohol or heating. However, with the popularization of laser technology, laser engraving of QR codes has no consumables, is environmentally friendly, and is not easy to erase, so it is widely used in all walks of life.

Laser engraving is classified by laser type, which can be divided into fiber marking, CO2 laser engraving, and ultraviolet laser engraving. And because the electronic components of the PCB circuit board are easily deformed by heat, the UV laser which is known as the cold light source stands out. The wavelength of the ultraviolet laser is 355nm, the beam quality is high, the focused spot is small, and the processing heat affected zone is small. It is greatly suitable for the QR code engraving of PCB circuit board electronic components. It will not produce thermal effects and will not cause material scorching problems. It has fast marking speed, high efficiency, stable performance, small size, low power consumption and other advantages.