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DIY PCB making, milling or chemical etching? (discuss.tchncs.de)
submitted 1 week ago by to c/askelectronics@discuss.tchncs.de
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Which do you prefer? I have the option to do both but milling seems to take awfully long and produces a lot of noise and glass fiber dust. It has the benefit of not needing etch resist which is also messy.

Chemical etching with iron chloride is also quite messy. First applying etch resist, removing part of it, etching etc. It is much simpler though and you don't need a CNC machine for this.

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[–] [S] 1 point 1 week ago (1 child)

Interesting read! I've seen a video on youtube where someone used white UV curing resin as the first layer and also as etch resist. It can be cleaned with IPA and you just leave it on after etching.

Afterwards a green layer of UV curing resin is applied and the laser is used to burn away only the green material so that silkscreen text becomes visible. I haven't tried it myself but it looks like a promising process.

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  • [–] 1 point 1 week ago

    Yeah I know about that kind of approaches but I haven't been able to test them, the resins don't look cheap and I don't make pcbs often enough to justify the cost. But I have tried engraving FR4 to get silkscreens on single sided boards. Decent results, but the smell is awful

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