Alt-BEAM Archive

Message #02847



To: Hyndman hyndmanm@cadvision.com
From: James Niemasik jfn@best.com
Date: Fri, 30 Apr 1999 17:22:34 -0700
Subject: [alt-beam] Re: PCB


I was not actually intending for people to use just this short message as their
PCB-making guide. I suggest they find a good book or website. This was just
intended as a small overview of what goes into making a PCB and what each
method looks like - I should have made that clear.

Hyndman wrote:

> >For artwork, you can draw with resist pens (only useful for small
> >circuits or
> >artwork touch-ups), you can use little resist stickers, or you can >design
> your
> >artwork on a computer, and print it either to iron-on paper for >PCBs or
> >transparencies, which you can use an ultraviolent lamp with for >special
> UV PCBs.
>
> >After you've got the artwork on the PCB, use Ferric Chloride or >Ammonium
> >Persulvate in crystal (dissolve it) or liquid form. Heat the liquid >and
> put the
> >board in, then agitate it for 5-25 minutes. Then use an SOS pad >or a wire
> brush
> >(or dremel) to scratch the resist off the board, leaving the copper
> >traces.
>
> Your forgetting a bunch of things, like putting it into developer, and
> liquid tin, preparing a copperclad board, percausions. I would reccomend
> buying a PCB fabrication kit, these things aren't what you call very safe
> chemicals. When explaining how to do it you have to be an expert on this, I
> don't think people would be too pleased with the list if a few people get
> chemical burns.
> Devin

--

* James Niemasik
* jfn@best.com
* James' BEAM Robotics Page:
* http://welcome.to/jamesbeam



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