Homebrew PCBs

Alexis Shaw wrote:
>   
> I think that in order to do 3 oz one must use semi-additive etching.
> that is put doen the photoresist and then electrroplate, strip the
> resist and etch the whole board.

You mean Negative print the resist, copper pattern plating up to 105�m,
metallic resist plating, resist stripping, metallic resist compatible
etchant  and metallic resist strip?

Milling the board seems much better!

I thought it could be done with 1 step etching since some processes used
in metal engraving seems very similar to pcb etching.