Homebrew PCBs

Convert your pads to square, set your routing up to
90degree only, and you should get pretty close, but
you may have to tweak trace widths.

Then create a unconnected ground net, lets call it
ugnd If your software doesn't like it, you can use a
1206 resistor to connect the ugnd to gnd, if it needs
to pass DRC, then just don't populate the 1206.

Next pour a poylgon plane with a clearance section
equal to your cutter's diaemeter and connect such
polygon plane to ugnd. Also be sure to set your
software up for leaving dead copper fills. It was a
common technique used up until around 1984 or 85, when
EMC became a regulatory issue.


Ron
--- Cristian <bip@...> wrote:

> >square pads should
> >generally be avoided.
> >Square pads also can
> >
> >Square pads
> >
> >Ron
> 
> Thanks, Ron, but is not about square pads. See,
> please, the uploaded file.
> 
> It is about to reduce the isolation spaces between
> copper to minimum.
> This way, the CNC mechanical etching will use less
> mill bit and chemical 
> etching will use less chemicals.
> 
> Is like designing a pcb by drawing the isolations
> instead of drawing pads 
> and traces.
> Cristian
> 
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