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JoinWin Electronics HK Limited → The Meaning And Use Of Pcb Color: Interpret The Meaning Behind Different ColorsAbstractPCB (Printed Circuit Board) is an indispensable part of modern electronic products. In the PCB manufacturing process, different colors of PCB usually represent different meanings and uses. This article will mainly explain why the common PCB version on the market is green. Main Parts Common PCB Colors PCB (Printed Circuit Board) is an indispensable part of modern electronic products. In the PCB manufacturing process, different colors of PCB usually represent different meanings and uses. First, the most common PCB color is green. Green PCB is the most traditional and classic choice, but also the most common color. Green PCBS are commonly used in general electronic devices and applications, including consumer electronics, computer hardware, and communication equipment. They have good insulation and thermal conductivity, while the manufacturing cost is relatively low. In addition to green, PCBS can also be blue. Blue PCBS are commonly used in high-end electronic devices and applications. This color gives a feeling of professionalism and high texture, so it is commonly used in fields such as high-performance computers, medical equipment, and military equipment. Blue PCBS usually have higher manufacturing requirements and technical requirements, so the manufacturing cost is also relatively high. In addition, the PCB can also be red, yellow, white and other colors. These color PCBS are usually used for specific application scenarios and special requirements. The Difference Between Different Colors Of Pcb Green PCB Green PCB is the most popular color. Therefore, many people have been mistakenly thinking that the PCB is green or most of it is green, green increases the clarity of the PCB, because the green PCB will have a sharp contrast with the white text, thus enhancing readability. In addition, the green PCB surface treatment reflects less light, helping to reduce glare. White PCB White PCBS look clean in a variety of environments and are becoming more and more popular. However, because the white PCB is easy to hide the line, white PCB is still not the first choice. But white PCBS look particularly contrasting in black screen printing. Yellow PCB Before the use of yellow PCB more, but now it is not so practical. Yellow PCBS can quickly meet different needs such as style, cleanliness and visibility. Yellow PCBS have one obvious disadvantage: poor contrast with wire and screen printing. Blue PCB Blue PCB is considered a thick plate for labels because it provides significant screen printing contrast. This PCB color is not as eye-catching as green PCB, black PCB, or white PCB, but blue PCB is the preferred PCB color because it provides an excellent aesthetic choice. Blue PCB installed on the LCD is better, because blue PCB does not produce sharp contrast edge and bright background color. Red PCB Due to some of the advantages of red PCB, many PCB manufacturers are keen to adopt red. Red PCBS provide excellent visibility and clearly define contrast for trace, flat and white space. The screen print looks very beautiful against the red PCB. Black PCB Black PCBS are as popular as white PCBS. These two PCB colors produce low contrast and make it easy to mark important components. However, the main disadvantage of black and white PCBS is that specific details may focus light and have small shadows. This shadow makes tracking difficult. Therefore, it is not appropriate to use black PCB in various high temperature applications, because black PCB may discolor screen printing. Moreover, the black PCB board is a mixture of cobalt and carbon, and the electrical conductivity may be poor. How Is The Pcb Color Difference Accomplished Different colors do not affect the way the PCB is manufactured. The copper is still placed on one or both sides, and as the copper is added or removed, the PCB becomes smooth. The copper layer on the PCB is very thin, which is why the green is so prominent. The thin copper layer is eventually covered during the welding process to prevent it from oxidizing, which is what the solder stop layer does. In many cases, it is also standard for green. In other colors, the copper won't show up clearly, so it's hard to see where the trace is. After drawing the trace, place the component in place. These need to be soldered in place according to the board diagram. Finally, after the components are in place, the circuit board is tested. If it works, they go into production. Most printed circuit boards need to be designed by engineers and prototypes need to be made before they can be put into production. Why Are Most Pcbs Green Now This is mainly because the green solder resistance process is the most mature and simple, and the green pcb board is also more environmentally friendly. The color of the circuit board in addition to green, there are white, yellow, red, blue, matte, and even chrysanthemum, purple, black, bright green and so on. White exists because we have to use it to make lamps. The use of other pcb colors is mainly to distinguish between different product samples. The entire stage of the company, from research and development to product landing, depends on the various uses of the PCB. The color of the experimental pcb board may be purple, the color of the key pcb is red, and the color of the computer internal pcb is black. Here are a few reasons to choose green PCB: 1, glass epoxy resin material Glass epoxy resin is a material used to make solder stoppers for circuit boards. This material used to be green and became the standard color for all assemblers in the industry using the same glass epoxy resin. Later glass epoxy resins were also introduced in some colors, but the assembler always considered using green. 2. Contrast between green and white printed text Assemblers often find it easy and time saving to scan green circuit boards because they are used to and very familiar with the color. They say it takes a lot of time to scan some different colored boards. Another reason is that green puts less strain on the eyes when scanning compared to other colors. Green is used because it also contrasts with the text printed in white on the board wiring. 3. It is used more in the military How military standards have a big impact on the green color of circuit boards. Many people think that green is very effective in circuit boards used for military purposes. The military requested green circuit boards from suppliers, who also supplied them to other customers. The boards eventually became surplus products from military suppliers. Therefore, not only assemblers, line workers or other customers consider green, but the military also accepts the green of circuit boards. 4. Exposure rate of solder resistance layer Circuit boards require higher soldering rates and are also available in other colors, but they do not provide a higher solder resistance layer for the board. Those with dark colors, such as blue, white, or brown, have high pigmentation, so they have dark solder resistance layers. Mainly white and black solder resistance layer with high exposure. But green provides a dark shade for workers' exposure and high tolerance in the design. 5, green PCB machine identification is better In general, electronic products have to go through the patch welding of the board and components. There are several steps to making a circuit board in the yellow light room. When the PCB color is green, the visual effect is better in the yellow light room. But that's not the main thing. When soldering the patch, it must be checked by brushing the solder paste, the patch, and the AOI on the back. These processes require optical positioning and calibration, and the green PCB background color has a better identification effect on the instrument. Источник: Joinwin Electronics Team • Подробнее: www.joinwinchips.com
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