On Wed, 7 Sep 2011, Bob Butcher wrote:
> That is an interesting thought. I happen to have an old Hermes engraving
> pantograph with a diamond tip. I could print the PCB out 2:1 and trace
> the spaces between lines to scratch the copper through to the substrate,
> which would isolate all the copper that I want to keep. As an
> alternative I could spray paint the copper and scratch off the paint
> where I want to remove the copper, followed by etching the copper in the
> scratches. I have used this technique before, but used an exacto knife
> or carbide scribe to hand scratch the paint off instead of a pantograph.
> I will have to try it and see what happens. It should work for fairly
> small boards in any case.
I don't think I would have the patience to make PCBs that way.
--
David Griffith
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