PCB Technical - Why use laser marking machine for PCB QR code

Why use laser marking machine for PCB QR code
Two-dimensional codes appear in every corner of our lives. Two-dimensional codes can store a large amount of information. As a new type of publicity and promotion method, it is slowly being used by more and more merchants. PCB, which is an important component of electronic products, is also using QR codes for traceability management and publicity applications. Then, why generally use laser marking machines for PCB QR code marking and marking?
Compared with the traditional marking method (inkjet machine), the marking of the laser marking machine appears clearer, because the resolution is higher, and the marking process of one path is more regular. Compared with the dot matrix font, It looks better at a glance, and the grade has been improved to a certain extent. At the same time, after reacting with the material of the PCB surface, the laser marking will have better color contrast, and the date, QR code, batch number, etc. can be seen at a glance. content.

Also compared with traditional inkjet printers, the ink often has adhesion defects and cannot form a firm adhesion on the product surface better. It is easy to wipe off. Adhesion is also a concern for many manufacturers. The laser marking machine is different. It can penetrate some oil and water to directly form laser-marked characters and QR codes on the surface of the PCB. Only when the PCB itself is broken will the QR code fall off.
Traditional processing methods require the use of inks and solvents at any time, and certain maintenance and cleaning agents are required during use. On the one hand, it is affected by the environment. Ink solvents are flammable, explosive, and have pungent odors. Liquid is harmful to the human body. On the other hand, the cost of use. The laser marking machine does not require any consumables and can almost achieve "zero maintenance". It can be used only by plugging in. Similar to new energy vehicles, the lower cost of use is also a major feature.

Ink inkjet printers not only require maintenance and maintenance, but also face the risk of shutdown or failure during use. Common situations include: ink line deviation, nozzle blockage, ink leakage, etc. The laser marking machine is not the case, the structure is relatively simple, and there is basically no need for specialized maintenance personnel, as long as the company does a daily inspection.
With the trend toward thinner and lighter PCBs, the range of printing QR codes is getting smaller and smaller, and QR codes below 5x5mm are usually required in certain areas. In some special applications, it is equipped with high-end bar code gun to read, and can print 1.5x1.5mm or even 0.8x0.8mm QR codes through laser marking technology. The unique fine processing of the laser marking machine is also useful.