Stefan,
Lasers can cut, drill and engrave. I mill circuit boards.
What saves me is the Mechanical Etching Bit has a tip that is
triangular. Any variation of the thickness of the copper or the board
will result in a slightly wider or narrower trace.
John
--- In Homebrew_PCBs@yahoogroups.com, stefan_trethan@g... wrote:
> > > Has anyone thought of a Yag laser for PCBs?
> > > I see people are actually 'milling' the unwanted copper off the
> > > boards.
> > >
> > >
> > > Yags are great for copper (On CO2 lasers, copper is a BIG no-
no)
> > and
> > > the beam can be delivered via fiber optics with a Yag. Plus
you
> > > cna 'drill' the holes without a tool change. Get fancy and you
can
> > > adjust to focus for bigger/smaller kerfs (though not recomemned)
> > >
> > > Nice chemical free way of doing it (at least chem free before
PTHs)
> >
> >
> > Here is a high speed PCBoard drilling machine that uses a
> >
> > laser.http://www.hitachidigital.com/laser.html
> >
> >
> >
> >
>
> really nice thing...
>
> but seems they also don't drill the copper - they use co2 laser...
>
>
> i wonder how it is possible to drill the resin and the glassfibers
in a so
> similar time that there is a smooth nice hole drilled.
>
>
> (i also don't believe the yag laser milling will work, but that's
only my
> opinion.....)
>
> regards
> stefan
>
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