We had, on occasion, had to solder additional copper foil (solder coated)
from the filters to ground.  Maybe this is an option.

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:   Jim Kittel [SMTP:[log in to unmask]]
        Sent:   Thursday, October 11, 2001 11:27 AM
        To:     [log in to unmask]
        Subject:        [TN] Attaching Microwave Components

        Hello Tec Netters,
        We are de-buging a new circuit board containing a microwave filter
operating
        in the 2 - 3 Ghz range.  This filter was soldered around the
perimeter of
        the case to the ENIG ground plane using 63/37 eutectic.  The
engineer is
        stating that electrically the filter does not appear to be
adequately
        grounded to that plane.  I am wondering if there is a better way to
attach
        these filters?  Would it be better to solder the entire bottom of
the filter
        case to the plane?  Is anyone using conductive epoxy?  Liquid or
sheet?  I
        would appeciate comments.
        Thanks,
        Jim Kittel
        L-3 Communications


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