Homebrew PCBs

mihai_hagianu wrote:
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> 
> 
> 
> Hi,
> 
> has anyone ever tryed electro-etchig for PCBs ? 
> What chemicals/ setup should be used? what pros and contras are in it?
> 
> thank you,
> mihai
> 
> 

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