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What is the color of the PCB board, as the name suggests, when getting a PCB board, the most intuitive to see the color of the oil on the board, that is, we generally refer to the color of the PCB board, common colors are green, blue, red and black and so on. The following Xiaobian share their understanding of different colors.
- 1, green ink is by far the most widely used, the longest historical event, and in the current market is also the cheapest, so green is used by a large number of manufacturers as the main color of their products.
- 2, under normal circumstances, the entire PCB board product in the production process is to go through the board and SMT process, in the board, there are so many processes must go through the yellow light room, because the effect of green in the yellow light room is better than other colors, but this is not the main reason. When SMT welding components, PCB to go through the solder paste and paste and the final AOI check lamp process, these processes are to learn optical positioning calibration, green background color on the instrument identification effect is better.
- 3.Common PCB colors are red, yellow, green, blue and black. However, due to the production process and other problems, the quality inspection process of many lines still must rely on workers to see and identify with the naked eye (of course, most of the current use of flying needle testing technology). In the case of strong light, the eyes keep staring at the board, which is a very old Liu's work process, relatively speaking, green is the least harmful to the eyes, so most manufacturers on the market are using green PCB.
- 4, the principle of blue and black is that they are mixed with cobalt and carbon lamp elements, with a certain electrical conductivity, in the case of power is likely to short-circuit problems, and green PCB is relatively environmentally friendly, when used in a high temperature environment, generally will not release toxic gases.
- And there are also a small number of manufacturers in the market will use black PCB board, the main reasons for which Xiaobian believes that there are two reasons: first, it looks high-end, and the black board is not easy to see the wiring, which brings a certain difficulty to the copying board. What Xiaobian learned is that most of the embedded boards of Android are now black PCBS.
- 5, about from the middle and late period of the last century, the industry has begun to pay attention to the color of PCB board, mainly because many high-end board types of first-line manufacturers have adopted green PCB board color design, so people slowly think that PCB color is green must be high-end.
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