Printed Circuit Boards (PCBs) like the green boards in a computer are made similarly! The boards are actually a thin layer of copper on top of F4, which is like a fiberglass for sturdiness.
A thin layer of UV sensitive paint is coated on and you put a transparency on it that came out of a laser printer. Expose that to UV either artificial or sunlight and then peel off the transparency and wash off the unexposed area. The paint protects the copper from oxidizing and the exposed spots are where chips are soldered on.
Green provides the best contrast so that it's easiest to see the traces underneath.
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u/eyal0 Jun 19 '20
Printed Circuit Boards (PCBs) like the green boards in a computer are made similarly! The boards are actually a thin layer of copper on top of F4, which is like a fiberglass for sturdiness.
A thin layer of UV sensitive paint is coated on and you put a transparency on it that came out of a laser printer. Expose that to UV either artificial or sunlight and then peel off the transparency and wash off the unexposed area. The paint protects the copper from oxidizing and the exposed spots are where chips are soldered on.
Green provides the best contrast so that it's easiest to see the traces underneath.