Why Most PCBs Are Green

In the fast-evolving world of printed circuit boards (PCBs), several key trends and technologies are shaping modern electronics manufacturing. From color choices to material selection and high-density designs, these innovations are improving performance, reliability, and efficiency.

The iconic green color of most PCBs comes from the solder mask, which protects the copper traces. Green remains the industry standard for several reasons:

• Mature and reliable: Green solder mask offers the lowest defect rate and withstands high temperatures effectively.

• Easy inspection: The human eye sees green clearly, making traces, pads, and defects easier to detect.

• Cost-effective: Green materials are widely available and cheaper than other colors.

• Historical standard: The color has become an industry norm over decades of use.

Other colors like black, red, blue, or white are typically used for aesthetic purposes or product differentiation