I just realized that most cheap PCB’s are normally green, especially older ones. Where as custom or higher end PCB’s range wildly in color, why is that?
In: Technology
The green is from solder mask, it just gives it some aesthetic over boring beige. Solder mask is required to keep the solder from spreading for surface mount components, and they tossed in some dye. It became just kinda tradition from there.
Of course like you said you can get other colors, and if you send in your own circuit design to a fab shop to make the boards for you they usually have a few colors to choose from. Internally at big circuit manufacturers they would sometimes use different colors for coding — green is just a regular old board ready for sale while red was used for prototype boards that shouldn’t be sold etc.
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