I finally got my Calcomp plotter to do something useful in this area...

Now I can plot a layout directly onto polished copper and etch right away.
It works, and Stadtler has sendt me some new penns I'll test tomorrow.
They're supposed to have superior coating ability and be completely
acid/water resistant.

The pen I now use have a width of about 0.3mm so there are big limits, but
the fill it gives is excellent.
I found that it creates a bit wider tracks at lowest speed, but in return I
get perfect coverage.
(Lowest speed is btw 1 inch/sec.)

I have made a movie of a layout being plotted and will publish it together
with high resolution images of the etched PCB on my web sometime.

This method is much faster for me as my UV exposure unit takes 45 minutes
for a good transfer.
And, as others have said, it's not as messy.

    KreAture

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