Hi all,
I got a feedback from the market that some modules are causing problems 
during insertion to sockets. Significant is that the problems occur just with 
PCBs from one supplier. I made correlation between different suppliers but I 
could not find differences in any dimensions. All of the boards are not 
chamfered. Thickness is always within spec of 1.27 +/-0.1 mm. The boards 
have 240 pins.

Is anybody out there who has experience in that? Are there any influences 
related to core materials, gold hardness, gold finger design? Or is this more 
socket related?

What are potential rootcauses?

Thanks in advance.
Ralph

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