Laser marking is a very advanced marking technology, through the focus of laser engraving technology, will need to mark the characters, patterns carved on the surface of the object. Compared with the traditional printing technology, laser marking has the characteristics of good quality, high consistency, high wear resistance, high efficiency, cost saving and safety, etc., and is widely used in the PCB industry.
Market demand under the progress of science and technology
With the IT industry of booming development, smart phones, wearable electronics products such as continuous toward lightweight, miniaturization, consumers are increasingly high requirements of electronic products, PCB production also must strive for excellence. In order to realize the quality control of the production process of PCB board, the information of character, one-dimensional code, two-dimensional code and so on are traced back to the development trend of the PCB board.
Traditional printing technology because of poor wear resistance, low precision, poor aesthetic, environmental pollution and other issues, more and more can not adapt to the new market technology needs. Therefore, the laser marking has become a trend in the PCB industry.
Defects in traditional printing technology
In the PCB board surface markers like pattern drawing, the company LOGO printing, contact mode, two-dimensional code, etc., in the past is usually used in traditional printing screen printing. Under the existing market demand, the traditional printing technology can meet the market requirements, but with the promotion of the quality of electronic products, the requirements of consumers become higher, resulting in market of the PCB mark quality is getting higher and higher, the traditional printing technology will not be able to adapt to new market demands, the disadvantage is becoming more and more obvious, such as:
1. Poor wear resistance, said here wear resistance is not metal material wear resistance, refers to is PCB surface and ink in use often wears off causing a blur and fade.
2. Aesthetic requirements, the appearance of the printed on the surface of metal to feel more low-end, for some of the look of high demand products is not suitable for, such as medals, metal business cards, fine company propaganda nameplate, arts and crafts show nameplate and unable to meet the requirements of its appearance.
3. Common printing process requires the use of organic solvents and heavy metals and other chemical raw materials, these substances has certain toxicity and may result in injury to the screen printing staff. In addition, silk screen printing ink drying process, volatile chemical raw materials gradually volatile into the air, on the air and the environment cause pollution.
Unique advantages of laser marking
The emergence of laser marking technology has successfully solved a series of difficult problems in the traditional printing technology. Its features are high precision, high speed and stable performance. And only through the computer control, easy to operate, can print a variety of complex patterns, text, two-dimensional code and other content, fully in line with the requirements of the existing PCB industry high-quality labeling.
Compared with the traditional printing technology, the laser marking technology has many advantages:
1 good quality, strong wear resistance. PCB board surface marking clear and beautiful, can be marked with a variety of LOGO, pattern, two-dimensional code, text and design is directly carved in the material above, wear resistance is more prominent;
2 machining accuracy is high. Laser beam emitted by the laser beam is focused on the minimum spot diameter can reach 10um (UV laser), in dealing with complex graphics and precision machining with little help;
3 high efficiency, simple operation, reduce the cost. Users only need to set up a good parameter on the computer can directly hit the standard, in a matter of seconds to ten seconds to complete the material surface markers.
4 nondestructive marking. Laser marking using non-contact processing, laser head without contact material surface, it does not need to consider the damage to the material;
5 wide range of use, safety and environmental protection. A variety of thin metal / nonmetal material can be marking;
6 stable performance and long service life. With the development of technology, the service life of the laser has been greatly increased, and the service life of the equipment has been greatly extended.
Application of UV laser marking and CO2 laser marking technology in PCB industry
In the PCB plate laser marking applications, the most used is the UV laser marking and CO2 laser marking. UV laser marking and CO2 laser marking with its thermal effect is small, the processing effect is good, high precision, high speed and so on, has become the first choice technology of PCB board surface marking.
In the PCB industry by laser marking of the two-dimensional bar code technology, PCB production, technology and quality traceability can be achieved, and realize the automation and intelligent management requirements, meet the needs of lean production, quality control, process improvement. Marking two-dimensional code on the PCB surface is the current high end customer needs, has been widely used.