Alt-BEAM Archive
Message #07315
To: beam@sgiblab.sgi.com
From: Senior kyled@cruzers.com
Date: Tue, 02 Nov 1999 20:32:18 -0700
Subject: [alt-beam] Re: photoetching
Where are you getting your photo-sensitive PCB material?
-Kyle
Greg Powell wrote:
>
> > Greg, I'm sure you'll see that the artwork that you start with
> >has everything to do with the finished quality.
>
> yup, I found this out this morning at 3:00am.
>
> > I've seen wonderful results from home photo-etching. No, Really!
> >Mind you they weren't _my_ results :-) The boards that I've seen
> >Rick D. make have straight even lines and good layer registration.
> >The layout, as a separate issue from the execution, is great too.
> >I think he might even share his secret formula with us if we ask
> >nicely. I don't recall if he plots directly to a transparency, or
> >if he plots and then copies to transparency.
>
> I edited the layouts pixel by pixel and then printed them onto transparency
> with a lazer printer. The graphixs were perfect and the etching turned out
> perfect by the third trial. I have a really neat setup for etching. I have
> the ferric chloride in a tuperware set into another tub with water and a
> fish tank heater. I also have an air pump airating the solution. Works like
> a charm :).
>
> I havn't had so much fun in quite some time.
>
> Greg
7316 Tue, 02 Nov 1999 21:14:40 -0800 [alt-beam] aquabot beam@sgiblab.sgi.com Greg Powell I am going to use an Erlinmyer flask instead of a test tube. An inverted
flask has a a lot more flat surface area for a solar array.
Greg
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