Homebrew PCBs

ST & DJ,

Thanks for the input. Of course I expect to get my hands dirty working out the finer details applicable to my equipment, I'm just
looking for a more practical entry point than starting out blind with phosphor bronze. You have provided a bit better relative
basepoint of expectations to work from; thanks for that. You both have referenced brass; should I take that to imply a close
parallel to phosphor bonze, which is the material of interest? (I had suspected the alloy may not be very similar to brass in terms
of etching)

TIA,

Roger

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of DJ Delorie
Sent: Monday, December 21, 2009 10:59 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Looking for a photo etching vendor

 

  


Yes, thicker brass takes a *lot* longer, you want to make sure your
etchant is fresh and hot or it'll be in the solution for an hour or
so.

Undercut is going to be about as much as the thickness of the brass; 8
mil brass means 8 mil undercut if you only mask one side - masking
both sides is better but you need to be accurate within the thickness
of the brass - a few mil in your case.

http://www.delorie.com/pcb/brass/

These days, it might be useful to look for people who have a small
laser CNC and are looking for small jobs to fill in the dead times.
I've seen a few pop up recently - try www.laserkrafts.com or
www.ohararp.com





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