Why are circuit boards predominately green?
Every radio, computer, game console, and other electronic gizmo I’ve opened up and looked within has a green circuit board. I’ve seen circuit boards of other colors after conducting an image search on a search engine, but that brings up the question why they are mostly green to begin with.
The only answer I can come up with is that perhaps the green ones are specifically for consumer electronics, and circuit boards of a different color are for the armed forces, or specialty purposes such as satellites or space shuttles. Thanks ahead of time for any input.
Tagged with: armed forces • colors • computer game • consumer electronics • different color • electronic gizmo • image search • radio computer • satellites • search engine • space shuttles
Filed under: Open Electronic Circuit
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My mother had a job on a Phillips assembly line putting together televisions when she was young. She says that is is so they can spot open or shorts or defects,Their job was to visually scan the boards for defects and the green was was a coating to protect the board and make defects easier to see.
Photocopiers and optical etching.
Just like how green is used with the TV weather, green is a nice easy color to make invisible in various optical processes. A green circuit board could have it’s traces photocopied onto a transparency because the green won’t show and the transparency used to make more boards. At least that’s how it was with the old analog photocopiers. It’s also why an Engineers Pad is green so that the graph lines don’t photocopy.
Probably isn’t a big deal anymore since board traces are all kept in files on computers but it was a big deal a couple of decades ago.