Yes, we do.  We have a couple of densely populated boards with a lot of
polarized capacitors.  We made a template out of .010" thick copper.   An
artwork was generated for the component locations and the copper was etched
like fabricating a stencil.  The polarity was then marked with ink on the
template.  This works rather well.  Once you generate the artwork your
stencil supplier could etch the material.  No frame is needed.

Jim Marsico
Senior Engineer
Production Engineering
EDO Electronics Systems Group
[log in to unmask] <mailto:[log in to unmask]>
631-595-5879



        -----Original Message-----
        From:   Jack Bryant [SMTP:[log in to unmask]]
        Sent:   Friday, August 10, 2001 10:21 PM
        To:     [log in to unmask]
        Subject:        [TN] Assembly Inspection/verification.

        TechNet,

        Has anyone tried to use templates or overlays at the end of a
machine process or the end of a progressive line as a quick check for
polarity or component orientations? If so what type of materials did you
make your overlays from? Were they conductive for ESD? Where did you have
your templates made? Can a board house make these from Gerber data? Stencil
shop? I would appreciate your comments. Thanks.

        J. Bryant

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