Greetings all,

I think it is time to throw this one out again to all you fab guys out
there, especially since we have yet to come up with a way to do it.  I don't
think a solution has ever been presented on this forum but I keep hoping :o)

Has anyone come up with a way to produce an edge plated feature that mates
up to a non-plated edge without producing a burr after routing AND with no
manual finishing required after routing??

We have tried various rout paths and cutting tool types without success.  We
even tried a good idea presented on this forum some time back which was to
rout after electroless copper.  What we found here though was (and this may
be hard to describe) that we ended up shorting the features together (lets
assume that we are routing through an array of plated holes on the edge of a
board which need to be isolated electrically from one another) by a thin
strip of plating along the leading edge of the panel.  The reason for this
is that the exposed edge (exposed by the post electroless rout) of copper
(on the surface of the panel) while covered on its surface by photoresist
still picks up copper and tin plating.  The tin of course then prevents this
thin strip from being etched off resulting in the short.

Hopefully you can follow that one.  Anyway, any suggestion?

Best Regards & Merry Christmas
John Parsons
Enigma Interconnect - Vancouver

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