> In PCB shops, they use an electroless copper plate to plate the inside
> of the holes. At this stage, the board is drilled, but not masked in
> any way. It's just plain copper on both sides.

I know but I also know that the electroless plating just barely sticks to
the holes (that and speed is why they electro it afterwards). Most
chemical depositions onto untreated surfaces have poor mechanical
characteristics (excepting the sticky black goo that should not be there
in the first place).

Peter

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics