The color of a PCB (printed circuit board) does not represent a specific function or performance. The main difference between different colors of PCB boards is the color of the solder mask ink used, and the solder mask layer mainly covers the wires to provide insulation and prevent short circuits. These ink colors include green, blue, red, black, etc.
Green solder mask ink is the oldest, cheapest, and most popular in history. The reason why it is widely used is that during the board making process, green has a better visual effect in the yellow light room and also has a better recognition effect on the instrument; Secondly, in processes such as SMT welding, a green background color helps with optical positioning calibration; The third reason is that green causes relatively less damage to the eyes, making it more suitable for workers to work for long hours.
The blue and black PCB boards have a certain conductivity due to the addition of cobalt and carbon, so there may be a risk of short circuits. However, if the design and manufacturing process of the PCB are identical, color will not affect the performance and heat dissipation of the PCB.
In the eyes of some people, black PCB boards may represent high-end products, but in reality, black PCB boards, due to their surface wiring being almost completely covered, bring great difficulties to later maintenance, and the yield rate is relatively low, so the price will be slightly higher. In recent years, people have gradually started to use solder mask paints such as dark green, dark brown, and dark blue to make manufacturing and maintenance more convenient.
Overall, the color of PCB boards is mainly for the convenience of manufacturing, maintenance, and visual recognition, and does not determine their performance or function. When selecting PCB board colors, it is necessary to consider practical application requirements and working environment.
