Homebrew PCBs

Adam,

What about your spray etcher? Ok, kind of off topic compared to an etch 
"tank" in the strict sense, but I wonder
if the spray etcher you built does deliver uniform results?

Markus

Adam Seychell schrieb:
>
>
> I was looking at an easier and more reliable way to etch PCBs. I know
> from experience that bubble etching never produces acceptable uniformity
> and often needs manual brushing to finish it off.
>
> I though maybe the bubbles could be released on one side of the tank
> causing etchant to flow in a circular path around the tank.
> The PCB is held vertically in a frame that pivots by two small shafts at
> either side. The moving fluid should continuously rotate the PCB around
> thus guaranteeing uniform concentrical etching. I'm not sure how uniform
> the etch rate would be radially.
>
> Has anyone tried making such a contraption ?
>
>