Why are PCBs mostly green?

捷多邦方先生

Why are PCBs mostly green? [Copy link]

Hello, everyone! Today I will share with you a very interesting topic: Why are most PCB circuit boards green?

Green oil board

Whether it is the various small household appliances we disassemble in our daily life or in various electronic markets, we can see circuit boards, and the color is always green. In fact, in the PCB industry, there are also black, red, and yellow circuit boards.

Black oil, red oil, butter oil, blue oil board

Relatively speaking, we usually see more green boards, so what secrets are hidden in them? Everyone knows that circuit boards are carriers for welding various components, and copper foil lines are distributed on them. If the copper foil lines are exposed to the air, the air contains water vapor and oxygen, and the copper foil is extremely easy to oxidize when it encounters water molecules, which affects the performance of the circuit. In order to prevent the oxidation of copper foil, researchers have invented a special coating that can effectively isolate the welding position and non-welding layer, so that the copper foil is not in contact with the air, and the copper foil line is safe and stable. This layer that isolates the air is the solder mask, and the material used is solder mask paint. In fact, this paint can also be other colors, but why is green so commonly used? Because, during the production and use of circuit boards, there are often some problems, and engineers need to spend a long time to repair them. Green is a recognized healthy ecological color. Compared with other colors, it is not easy to get tired when looking at the production and maintenance of green circuit boards for a long time. Moreover, the circuits are relatively clear under the green solder mask and are easy to repair. After green was accepted by the majority of manufacturers, the production cost and selling price were also low, so there are more green PCB circuit boards on the equipment.

Black paint is often used to produce higher-end products, and the circuits are covered under the black paint, which makes maintenance inconvenient and also has requirements for the production process of vias. Therefore, this has invisibly increased the price of black PCB circuit boards, and they are not often seen in life.

The principle of other colors of paint is similar to that of black paint. In fact, color will not affect the performance of the circuit board. Some people say that it is not the color that gives meaning to the product, but the product that gives meaning to the color. I think it makes sense. What do you think?

捷多邦方先生

Welcome to like and comment!

btty038

Maybe it has something to do with the green plants, the beautiful scenery.

曹伟1993

Because if you change to another color of circuit board, you have to pay extra, but the green one is free, so of course you should use the free one.

qwqwqw2088

In the past few years, it was indeed expensive to make black boards.

The price seems to be the same now.

PowerAnts

Others don't charge for miscellaneous colors, so you say your black cost is too high, you deserve to be inferior to others

dike1608

PCB factory green oil production is simpler