Homebrew PCBs

On 5/10/2014 8:31 PM, Peter Johansson rockets4kids@... 
[Homebrew_PCBs] wrote:
>
> I have a project idea that would require hundreds (possibly thousands)
> of very small PCBs, each one being a circle approx. 1/2 inch in
> diameter. Does anyone know if it would be possible to punch them out
> of thin FR4 with a punch press? That is, use the material that is
> normally discarded when punching out a hole.
>
> Aside from that, what (if any) are the issues with using thin (0.010"
> - 0.030") PCB material in general?
>
>
Hello--

If your board has a ground plane (i.e., is two-sided) and is made of thin
stock, the punching operation can stretch copper around the board's edges
and thus cause possible creepage problems.

This can be a problem if traces on the board's top side go all the way to
the edges.

73--

Brad  AA1IP

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