Laird Technologies has designed a custom shield for us that looks like
it will work well. 
We are still in prototype stage and time will tell. We will be in
assembly by the end of May. 
It is a 2 part shield: a fence that will solder to the board in reflow
(broken lengths of solder paste set in continuous band under shield).
After final test, the lid will be added to close the shield.
Laird has an engineer named Shelby Ball who designed this to our spec.
Our shield is 1'' x 2.05". He was easy to work with and very responsive
to our needs.
Our last shield effort failed because the co planarity was bad. Laird
guarantees +/-0.004 on co planarity tolerance.

Barbara Burcham, C.I.D.
Sr. PCB Designer
RFTrax a Fairfield Co.
[log in to unmask]
281-276-5916
281-276-5950 fax
 
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: Tuesday, May 08, 2007 7:06 AM
To: [log in to unmask]
Subject: [TN] RF shields

Hi everybody,

I have a very demanding RF board which has fifteen 2"x2" and five 2"x1"
fences. They are pretty tricky, as they tend to lift corners and require
a lot of rework.

The question is: is it possible not to solder the fences to the PCB, but
only clip them on the opposite side? Is soldering a must for the RF
performance?

Thanks,

Ioan

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