Donna:

You can certainly plate right onto the copper, but the nickel acts as a
barrier between to copper and gold so you don't get copper migrating
into the gold and wrecking it (not a very scientific term, sorry).

Ralph Richart


Donna Perry wrote:

> If we want a board to be gold plated .00003 to
> .00005 thick, can it be done over electro-plated
> copper or must nickel be applied first?
>
> DPerry