Why is the PCB Circuit Board Mainly Green?

1. Low cost
Green PCB is one of the most widely used types of PCB boards, so the cost of large-scale production is relatively low, which can provide a more cost-effective solution. Therefore, green is widely used by manufacturers as the main color of their products.

2. Convenient development
In the PCB manufacturing process, chemicals are needed to remove unnecessary parts. Green PCB boards are easier to develop than PCBs of other colors because during chemical development, green is more easily soaked by the developer, making unnecessary parts easier to remove.

3. Good visual effect
The color of green pcb circuit board helps to enhance the visual contrast of high brightness metal pads and markings, making the circuit board easier to identify and maintain. On the one hand, due to current production processes and other reasons, the quality inspection process of some lines still requires workers to visually observe and identify them. Staring continuously at the board under bright light is a very tiring work process, and green is relatively the least harmful to the eyes.
On the other hand, typically, the entire PCB board product undergoes processes such as board making and SMT during the pcb manufacturing process. When soldering components in SMT, the PCB needs to go through the process of solder paste and bonding, as well as the final AOI calibration lamp. These processes all require optical positioning calibration, and a green background color is better for the instrument's recognition effect.

4. Good confidentiality
The color of green PCB is relatively common compared to other colors, so it is relatively difficult for people to guess and imitate the special design of the circuit board, and it has good confidentiality. Of course, due to confidentiality considerations, a small number of manufacturers in the market will use black PCB boards. Because the black board is not easy to see the wiring inside, it brings certain difficulties to copying the board. Careful partners will find that most Android embedded boards use black PCBs.

5. Long history of use
Since the mid to late 20th century, the industry has begun to pay attention to the color of PCB boards, mainly because many high-end board designs in first tier large factories adopt green PCB board color designs. As a result, people gradually believe that if the PCB color is green, it must be high-end. Therefore, the use of green PCBs has been more long-standing and widespread.

6. Relatively safe and environmentally friendly
Compared to other colors, green PCBs are relatively safe and environmentally friendly. For example, blue and black inks mixed with cobalt and carbon lamp elements respectively have certain conductivity, which may cause short circuits when powered on. However, compared to green inks, the possibility of short circuits is relatively small. Moreover, green PCBs are relatively environmentally friendly and generally do not release toxic gases when used in high-temperature environments.