mihai_hagianu wrote:
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>
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> Hi,
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> has anyone ever tryed electro-etchig for PCBs ?
> What chemicals/ setup should be used? what pros and contras are in it?
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> thank you,
> mihai
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>
We had some discussion sometime ago in Homebrew_PCB. The consensus was
it is probably achievable but not practice for just the occasional PCB.
There is an extra tank to setup, while I think the cost of etchant in
normal etching is small in the scheme of things.
Sulfuric acid would the electrolyte of my choice, probably 100 g/L to
200 g/L. With bubble agitation, I'd expect you could get a current
density at the anode (PCB) of over 5 A/dm^2.
Adam