Homebrew PCBs

Hi John,

On Mon, Jul 28, 2014 at 10:01 AM, hudakjm@... [Homebrew_PCBs]
<Homebrew_PCBs@yahoogroups.com> wrote:
>
> I was looking at some commercially produced patterns and they seem to frequently employ fillets.  This is I presume to prevent cutting in of the pattern at 90 degree corners when the board is etched.

I reckon use of fillets to prevent overetch in the corners is a
historical thing.  These days it's mostly done for aesthetics.  I
supply thousands of PCBs a month commercially, and filletless right
angles are not a problem at all.

It may still be relevant for home etching though, where timing and
process chemicals are not controlled as strictly as in commercial
production.  I suggest making a test board that you can use to explore
how well the home etch process works for you. All the best!

Mitch
http://www.hackvana.com/guide