PCB Tech - The function of pcb board with different colors

Careful friends must have found out that PCB boards have different colors. Is there anything special about this color? Today I will reveal the secret for everyone.

What is the color of the PCB board, as the name suggests, when you get a PCB board, the most intuitively you can see the oil color on the board, which is what we generally refer to as the color of the PCB board. Common colors include green, blue, red and black, etc. Wait.

1. Green ink is by far the most widely used, the longest in history, and the cheapest in the current market, so green is used by a large number of manufacturers as the main color of their products.

2. Under normal circumstances, PCB board product the entire has to go through the board making and SMT processes during the production process. When making the board, there are several processes that must go through the yellow light room, because the green is in the yellow The effect of the light room is better than other colors, but this is not the main reason.

When soldering components in SMT, the PCB has to go through processes such as solder paste and patch and final AOI calibration. These processes require optical positioning and calibration. The green background color is better for the identification of the instrument.

3. Common PCB colors are red, yellow, green, blue and black. However, due to problems such as the production process, the quality inspection process of many lines still has to rely on the naked eye observation and identification of the workers (of course, most of the current flying probe testing technology is used). In the case of strong light, the eyes keep staring at the board. This is a very tiring work process. Relatively speaking, green is the least harmful to the eyes, so most manufacturers in the market currently use green PCB.

https://www.ipcb.com/pcb-design.html

4. The principle of blue and black is that they are doped with elements such as cobalt and carbon, respectively, and have certain electrical conductivity. Short-circuit problems are likely to occur when energized, and green PCBs are relatively environmentally friendly, and are relatively environmentally friendly. When used in medium, generally no toxic gas will be released.

There are also a small number of manufacturers in the market that use black PCB boards. The main reason for this is that the editor believes that there are two reasons:

Looks higher-end;

The black board is not easy to see the wiring, which brings a certain degree of difficulty to the copy board;

What the editor understands is that most of the Android embedded boards now use black PCBs.

5. Since the middle and late stages of the last century, the industry has begun to pay attention to the color of PCB boards, mainly because many high-end board types of major first-tier manufacturers have adopted green PCB color design, so people slowly believe that PCB If the color is green, it must be high-end.

In fact, based on various reasons, the editor believes that in general, it is better to use green PCB. The above is the question of whether the color of the PCB board is exquisite.