[SI-LIST] Fw: About the spacing between GND pad and PCIE traces

Dear Experts,

I have a question about the layout of PCI Express traces. We planned to use 
5mil trace width and 6mil (or 7mil) air gap for each PCIE differential pair. 
But there are two GND pads that are located at the both sides of the 
differential pair (Each differential pair is sandwiched by two GND pads) .  The 
spacing between GND pad and PCIE trace is only 5mil. As PCIE has very high 
swithing frequency, my concerns are if the two GND pads will impact PCIE signal 
quality. Is it possible that PCIE signal will be coupling to GND pads ? Thanks 
for you help.

Best regards,

Peter  

                 
       
   
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