[SI-LIST] material information

Hello, All. 
 
For modeling using HFSS, 
I'm looking for information about some materials. 
 
 - tungstem <<W>> :  electrical conductivity 
 - polyimide : dielctric cnstant, loss tangent 
 
I want to do modeling of the Needle on Probe Card in Test Industry. 
 
Thanks for any information. 
YS Shin
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