We have this problem of RFI shields (cans) over component groups. Most
     of our shields are fab from a sheet metal house. The PCB would have
     routed plated through slots (to ground) in which we solder the shield
     to. This is hard for servicing and not always easy to solder, since
     the shield is a big heat sink.

     We are now experimenting with surface mount shield clips that are pick
     & place ready, and solder through reflow. Another advantage is the
     shield is removable for servicing. I have no qty track record yet.

     Possible problems: There is a gab between the board and shield, the
     supplier says to put a u shape cutout where the clip is to lower. How
     may are needed for good shield grounding (our current shields have a
     ground point approx every 1"). These clips cost around $.05 each low
     qtys.

     One supplier of the clips is autosplice.


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Subject: [TN] TN:shielding...is this all there is??
Author:  Donna Perry <[log in to unmask]> at _Internet