Hello,

We build connectors/sockets using laminates w/o copper and our 
connectors often are large and low profile.  Since we promise 0.006" 
max flatness and coplanarity, warp and twist problems have to be 
monitored and controlled.  There are a couple of things we have learnt.

1. weave/glass orientation in the laminate needs to be controlled
2. lamination presses do make a difference - Edge effects do lead to 
problems.

Regards,

Prashant

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