From: Roger Johansson
Subject: Re: Printing dircetly onro PCB copper side Part II
Date: Sat, 14 Sep 2002 16:12:20 +0200
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Roger Johansson wrote:
>Getting back to the cutter method:
I would also like to mention other technologies, with higher cutting
A miniature sandblaster is often used to cut cloth and other
The high pressure water or air, mixed with fine sand, cuts through
abrasing. It would be easy to set the cutting speeds and durations to
achieve a 0.1mm deep cut, or let it run for longer in the same spot to
make a through-hole.
We could use a high pressure pump and mix the water with fine mud.
Find some suitable nozzle, with a diameter of 0.3mm, for example.
Blow the tubes clean at the end of every cutting operation.
The used water is recycled.
Cloth cutters use clean water but for pcb we need to mix an abrasive
material with the water.
This is maybe the best technology for making pcb without UV-light,
photoresist and etching. It can use thin cutting widths, at least down
to .3mm seems possible. There is no need for any manual work beside
putting the laminate in the cutter and taking it out again, ready to
A variation on the theme is to use high pressure air, mixed with fine
sand (dust-sized particles).
Another alternative is to use a laser, but I don't know enough about
that technology. I think the heat might make the pcb ugly, if it works