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Electroplating and Surface Coating Technology of Printed Board

Electroplating and Surface Coating Technology of Printed Board

The electroplating and coating process technology of printed circuit boards produced by pcba manufacturers is also known as the surface coating process technology of circuit boards, which almost runs through the entire production process of circuit boards. Weldability, corrosion resistance, wear resistance and other performance requirements. It involves a number of processes of the printed board, and there are many varieties of electroplating or coating, and the process methods are also different.

The surface coating process of printed boards is mainly used in:
Electroplating and Surface Coating Technology of Printed Board
① After the chemical immersion copper process in the hole metallization process, the surface needs to be electroplated with 5-8μm metal copper to thicken the hole wall of the metallized hole and meet the requirements of the subsequent production process. The hole wall can also be thickened by electroplating copper after hole metallization using direct plating technology.

② In order to improve the solderability of the surface of the pcba board, the pcb manufacturer should coat the board surface according to the needs, such as electroplating nickel/gold, electroplating tin-lead alloy or tin alloy, electroless nickel gold plating, electroless silver plating, hot air leveling, As well as coating the organic anti-oxidation solder protection agent (OSP) on the copper plating layer, etc.

③ The pcba factory often needs to electroplate nickel-gold at the parts where the printed board has contact connection to improve the wear resistance and oxidation resistance of the contact point, and reduce the contact resistance. The processing procedures and functions of the above pcba foundries are realized by electroplating or coating. The circuit board manufacturer understands its process and characteristics, which can not only help the manufacturers of the printed board to better grasp the process principle and control the product quality; at the same time, it can also enable the designers of the printed board to understand the surface of the printed board. The coating process and the characteristics and uses of various types of coating, so that the best coating can be selected and used more correctly in the design. Because the coating of the printed board has an important influence on the performance and life of the printed board, this section will give a more detailed introduction to various electroplating and coating processes in the printed board processing.

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