Homebrew PCBs

----- Original Message ----- 
From: "lcdpublishing" <lcdpublishing@...>
> Hmmm, makes me think of another possiblity though - laser etching?  
> I know there are lasers that can focus their "cutting depth" which 
> might allow for cutting through the copper and not the substrate.  I 
> would have to guess that this sort of laser would require a bit of 
> power though.  

EDM, perhaps, but still suffers from imperfect flatness on the substrate.