Can you send me the dwg? If there's enough spacing between
the selective areas it can bedone.
Eddie Rocha

(408) 978-8992

Here's a Friday afternoon puzzler.  We're participating in
a project with
another firm who is responsible for designing the circuit
and PCB.  They
just discovered their controller chip wasn't as effective
as early testing
showed, so they've switched to another.  What they want to
do is use a
daughter board to allow the alternate part to be placed on
the footprint of
the first part.  The footprint of the original part uses an
.035 wide pad on
a .050 pitch, near as I can measure.  It has 15 pads per
side on two
opposing sides.   The concept of the daughter board was to
selectively plate
two of it's edges to simulate a J leaded device.  I've
successfully plated
the entire edge of some boards for years now, but know of
no way to
selectively plate "leads" about .030 wide along an edge of
an .062 thick
board.  One house in the Pacific northwest was able to
actually do it for
some protos, but with a very low yield and refused to take
the production
order.  My local house that's been doing the entire edge
for years and
another high end house looked at the design and laughed.
 My recommendation
to Sr. Management is to respin the mother board and take
the hit.

Does anyone know of a house anywhere that could plate (and
trim) a plated
edge to simulate a lead and is crazy enough to accept an
order for 350
pieces total?

Bob Croslin
Nielsen Media Research

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