The resolution of a 3D printer will not be good enough for fine pitch components. A 0.4 mm nozzle will extrude a 0.4mm tube of melted plastic. That will be your minimum trace (about 16mil). if you squish it onto the PCB, the trace will grow probably about 20mil.
If your PCB can accept these constraints, using PLA might work for you. To remove it, just wipe it out with acetone.
Just my $0.02,
Jean-Paul
N1JPL
> On Jan 25, 2016, at 2:32 PM, palciatore@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
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> I don't know if it has been discussed before, but has anyone ever used a 3D printer to deposit a layer of plastic on a circuit board to use as the pattern for etching? It seems to me that this may be an easy way to do this as no extra steps would be needed, just print and etch.
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> If so, how did it work? And how did they remove the plastic after the etch?
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