At 03:29 PM 7/23/01 -0500, you wrote:

>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.
>
>They follow this with an electroplate step, but the electroless part is how
>they plate the holes.

My understanding from the various PCB plants I've toured is that the
electroplating provides most of the copper thickness on the insides of the
holes, the preceding chemical processes establish a conductive base on
which to
electroplate the thicker layer of copper inside the holes.

Maybe that's what you are saying.

Best regards,

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