Homebrew PCBs

----- Original Message ----- 
From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, November 16, 2005 4:25 PM
Subject: Re: [Homebrew_PCBs] Re: A $500.00 "UV" non-trivial exposure 
box.....


> You drill before etching?

Eagle's drill legend makes it a breeze; turn off the brain and poke the 
right sized drill at the right symbols.

Also, I'm working up the verve to try plating the through-holes. The holes 
have to be there before etching to plate them. I wrote Dow Corning for a 
30cc sample of their conductive ink; too expensive to buy (Think and Tinker) 
just for an experiment. Anyway, it's a long proof of concept. There's no 
hope of plating the holes if drilling before etching doesn't work for me. 
It's working well enough; I would be more pleased if I could remove my fat 
fingers from the results.

> Remove paper, etch, rinse, scrape off toner.
> Do the same as above with legend, only use silicone paper which peels
> easily to leave a black legend (I still have coverage/pinholes problems
> with the silicone paper, so i only use it for legend. But for etching the
> grey paper residue bothers nobody ;-) )

What grey paper is that? I'm using Pulsar's paper, which works very well: 
releases very cleanly and easily.

> I'm not entirely sure if i understood your instructions.

Just a long winded way of saying: align, heat and press, soak in the sink 
for a few seconds. Repeat for side two.