PCBA assembly and processing plant production process, the printed board plating and coating process technology can also be called the circuit board surface coating process technology. These technologies are not only throughout the production process of the circuit board, but also through different surface treatment methods, significantly improve the appearance of the PCB board, solderability, corrosion resistance and abrasion resistance and other key properties.
First of all, the main applications of plating and coating technology are reflected in the following aspects:
1. Enhancement after hole metallization: In the manufacturing process of printed circuit boards, the chemical copper immersion process is a key step in hole metallization. Subsequently, plating technology is used to thicken the hole wall of the metallized holes to ensure that the hole wall reaches a thickness of 5 to 8 microns to meet the needs of subsequent processing.
2. Optimize Solderability: In order to enhance the solderability of PCB board surfaces, manufacturers use a variety of plating and coating techniques. These techniques include nickel/gold plating, tin-lead alloy or tin alloy plating, as well as chemical nickel-gold plating and chemical silver plating. In addition, hot-air leveling and organic oxidation-protective solder (OSP) coating are also commonly used.
Enhance the performance of the contact point: In the printed circuit board has contact connection parts, electroplating nickel gold technology is widely used. This technology can significantly improve the wear resistance and oxidation resistance of the contact point, while reducing the contact resistance, to ensure the stability of the circuit board.
In-depth understanding of the various processes of PCBA assembly and processing plant, you will find that the process and characteristics of plating and coating technology not only helps circuit board production staff to better grasp its principles and control product quality, but also enables printed circuit board designers to more accurately select and use plating and coating in the design. This is because the choice of plated coating has a significant impact on the performance and lifetime of the printed circuit board.
