PCB Tech - What are the colors of high-frequency circuit boards?

What is the color of the high-frequency circuit board? As the name implies, when you get a high-frequency circuit board, the most intuitive thing to see is the color of the oil on the high-frequency circuit board, which is the color of the high-frequency circuit board we generally refer to. Common colors are Green, blue, red, black, etc.

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. Common high-frequency circuit board 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). The eyes are constantly staring at the board under strong light. This is a very tiring work process. Relatively speaking, green is the least harmful to the eyes, so most manufacturers currently use green high-frequency circuit boards in the market.

When soldering components in SMT, the high-frequency circuit board has to go through the processes of solder paste and patch and final AOI calibration. These processes require optical positioning and calibration. The green background color is good for the identification of the instrument. Some.

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

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

There are also a small number of high-frequency board manufacturers in the market that use black high-frequency circuit boards. The main reason for this is that the editor of Shenzhen Mingchengxin Circuit believes that there are two reasons:

1. It looks high-end;

2. It is not easy to see the wiring in the black high-frequency circuit board, which brings a certain degree of difficulty to the copy board;

What I learned is that most of the Android embedded boards are black high-frequency circuit boards.

5. Since the middle and late stages of the last century, the industry has begun to pay attention to the color of high-frequency circuit boards, mainly because many first-tier manufacturers have adopted green high-frequency circuit board color designs for high-end boards, so people are slow Slowly thinking that the color of high-frequency circuit boards is green, it must be high-end.

In fact, based on various reasons, the editor believes that it is better to use green high-frequency circuit boards under normal circumstances.

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