Laser marking is a very advanced marking technology. Through the focused laser engraving technology, the characters and patterns that need to be marked are carved 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, and it is widely used in the PCB industry.
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Market demand under technological progress
With the rapid development of the IT industry, smart phones, wearable electronics and other products continue to develop towards lightness, thinness and miniaturization. Consumers have higher and higher requirements for electronic products, and the production of PCBs must also be improved. In order to realize 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.
Defects of traditional printing technology
Marking on the surface of the 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, consumers' 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 abrasion resistance. The abrasion resistance mentioned here is not the abrasion resistance of metal materials. It refers to the situation that the ink on the surface of the PCB is often worn away during use, causing blurring, discoloration, etc.
2. Aesthetic requirements. The appearance of metal surface printing is relatively low-end. It is not suitable for some products with higher appearance requirements, such as medals, metal business cards, exquisite company promotional nameplates.
3. In the ordinary printing process, organic solvents and heavy metal elements and other chemical raw materials are required. These substances are toxic and can cause personal injury to screen printing workers. In addition, during the drying process of screen printing inks, volatile chemical raw materials gradually volatilize into the air, causing 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.
1. Good quality and strong wear resistance. The marking on the surface of the PCB is clear and beautiful, and various LOGO, patterns, two-dimensional codes, and text can be marked, and the patterns are directly engraved on the material, which has more outstanding wear resistance.
2. High processing accuracy. After the laser beam emitted by the laser is focused, the smallest spot diameter can reach 10um (UV laser), which is of great help when processing complex graphics and precision processing.
3. High efficiency, simple operation and lower cost. 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. Stable performance and long equipment life. 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.
#Component Identification
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Silkscreen markings provide clear labels for components such as connectors, resistors, capacitors, and integrated circuits. These labels help users easily identify and locate specific components during assembly, testing, and troubleshooting processes.
#Reference for Component Placement
Silkscreen markings serve as a visual guide for accurate component placement during PCB assembly. They indicate the designated positions for components, ensuring proper alignment and reducing the risk of errors or misplacements.
#Improved Clarity and Readability
Silkscreen markings enhance the legibility of important information on the PCB. Clear and properly aligned text, symbols, and graphics make it easier for technicians, engineers, and users to interpret the board's specifications, part numbers, reference designators, and other essential details.
#Error Prevention and Quality Control
#Branding and Professional Appearance
#Enhanced Troubleshooting and Maintenance
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