Analysis of the advantages of laser marking in the PCB industry

Laser marking is a very advanced marking technology. Through the focused laser engraving technology, the characters and patterns that need to be marked are engraved on the surface of the object. Compared with traditional printing technology, laser marking has the characteristics of good quality, high consistency, strong wear resistance, high efficiency, cost saving, safety and reliability, etc., and it is widely used in the PCB industry. Market demand under the advancement of science and technology. With the rapid development of the IT industry, products such as smart phones and wearable electronics continue to develop towards thinness and miniaturization. Consumers have higher and higher requirements for electronic products, requiring the production of PCB boards We must also strive for perfection. In order to achieve the quality control of the PCB production process, marking characters, one-dimensional codes, two-dimensional codes and other information on the PCB for traceability has become the development trend of the industry. Traditional printing technology has become increasingly unable to adapt to new market technology needs due to problems such as poor wear resistance, low precision, poor aesthetics, and environmental pollution. Therefore, laser marking has become a trend in the PCB industry. The defects of traditional printing technology are marked on the surface of PCB board like pattern drawing, company LOGO printing, contact information, two-dimensional code, etc. In the past, silk screen in traditional printing was usually used. Under the original market demand, traditional printing technology can also meet the requirements of the market. However, as the quality of electronic products continues to improve, consumer requirements are getting higher and higher, resulting in higher and higher marking quality of PCB boards in the market. Traditional printing Technology cannot adapt to new market requirements, and its shortcomings are becoming more and more obvious, such as: 1. Poor wear resistance. The wear resistance mentioned here is not the wear resistance of metal materials, but refers to the fact that the ink on the PCB surface is often used It will be worn away and cause blurring, color fading, etc. 2. Aesthetic requirements, the appearance of metal surface printing is relatively low-end, which is not suitable for some products with high appearance requirements, such as medals, metal business cards, exquisite company publicity nameplates, handicraft description nameplates, etc. Meet its appearance requirements. 3. Chemical materials such as organic solvents and heavy metal elements are needed in the ordinary printing process. These substances are toxic and can cause personal injury to the screen printing staff. In addition, during the drying process of the screen printing ink, volatile chemical raw materials gradually volatilize into the air. , Pollution to the air and the environment. Unique advantages of laser marking The emergence of laser marking technology has successfully solved a series of problems in traditional printing technology. It is characterized by high marking accuracy, fast speed and stable performance. Moreover, it only needs to be controlled by a computer, and the operation is simple, and it can print various complicated patterns, texts, two-dimensional codes and other content, which fully meets the high-quality marking requirements of the existing PCB industry. Compared with traditional printing technology, laser marking technology has many advantages: 1. Good quality and strong wear resistance. The marking on the surface of the PCB board is clear and beautiful, and it can be marked with various LOGO, patterns, two-dimensional codes, and text. The patterns are directly engraved on the material, which has more outstanding wear resistance; 2. High processing 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 when processing complex graphics and precision processing; 3. High efficiency, simple operation, and cost reduction. The user only needs to set the parameters on the computer to mark directly, and the surface marking of the material can be completed in just a few to ten seconds. 4. Non-destructive marking. Laser marking uses non-contact processing, the laser head does not need to touch the surface of the material, so there is no need to consider the damage to the material; 5. Wide range of use, safety and environmental protection. All kinds of thin metal/non-metal materials can be marked; 6. Stable performance and long service life of the equipment. With the development of technology, the service life of lasers has been greatly increased, and the service life of equipment has been greatly lengthened. The use of laser marking QR code technology in the PCB industry can realize PCB production, process, and quality traceability, and realize automated and intelligent management requirements to meet the needs of lean production, quality control, and process improvement. Marking two-dimensional codes on the surface of PCBs is currently a common demand of mid- to high-end customers and has been widely used.