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Subject: Re: [Homebrew_PCBs] Re: 35% H2O2 and HCL - Ratio?

From: Piers Goodhew <piers@...>
Date: 2010-06-21

Yes, I've taken to putting some extra annulus on them and, of course, going
SMD when and wherever possible..

PG

On Mon, Jun 21, 2010 at 1:10 PM, sailingto <sailingtoo@...> wrote:

>
>
>
> > I've certainly had little trouble with 10mil traces (0.010 inch) out of
> > Eagle with Ammonium Persulphate - I do find Eagle's square through-hole
> pads
> > a bit prone to over etching, but come to think about it, they etch OK,
> > they're just bloody small!
> >
> > PG
>
> Doesn't matter which program used for the layout, most of them do have
> pretty small pads. These small pads are ok for a commercial board with
> solder mask, but for a home etched board I find it's better to use larger
> pads. My pads and traces are usually a good bit larger than standard. This
> helps prevent problems of pads lifting during rework as most of my boards
> are prototypes requiring removal of parts a few times.... sometimes I get
> lucky and do the design correct first time.
>
> Just make the pads as large as you wish.
>
> Ken H>
>
>
>


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