Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "LogicResearch" <logicresearch@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, April 04, 2006 1:39 PM
Subject: Re: [Homebrew_PCBs] Making the PCB


> Thanks for that, this should be fresh as I just brought it but who knows
> how
> long it's been sitting on RS's shelf.
> Another thing I thought of is that it had not dried properly.
> I have another set of practice boards curing overnight that I will play
> with
> tomorrow.
>
> Is there a better etchant than Ferric Chloride?
> Will I ever get some sleep?

Are you using pre-coated boards or coating them yourself?

The uneven etching due to resist remaining after development is a sign that
it might be old stock, if the boards are pre-coated. Is RS Radio Shack or RS
in the UK? The latter will be OK.

You don't need to dry the boards after development, just rinse them well
and put them straight in the etchant. I use ferric chloride because it can
be re-used many times,unlike ammonium or sodium perchlorate.

Leon
--
Leon Heller, G1HSM
leon.heller@...
http://www.geocities.com/leon_heller

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