Homebrew PCBs

Dan,

I'm not surprised that the 60W laser wouldn't cut copper. Copper is such a
good conductor of heat that you need a pretty hefty laser to ablate it. I
think that cutting through a lacquer on top of the copper would turn this
into an advantage, and allow very clean cuts to be made.

One problem might be that the beam might be too small to cut away large
areas. To a certain extent this could be solved by defocusing the beam
slightly.

I wonder whether the laser engraver could also be used to drill holes after
the copper is etched. How does the laser engraver deal with toxic fumes?

Neil


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