Homebrew PCBs

> You could, perhaps, buy some thin copper foil - say 4 mil - and glue it to
fr4,
> then cut the traces. Copper foil comes in many thicknesses and might even
be
> available with adhesive backing.


Indeed it does.  You can get rolls of it about 25mm wide, used for shielding
cases and so on.  3M make some.  I can't recall seeing anything wider than
that, the only other source is for making stained glass windows, but that
only runs to about 6mm wide.

In theory you could get wider rolls as they just cut if from a big one.

Tony