About Skin Depth with pcb RO4350B

[aunsteel]

Hi every one. i'm have question about Skin Depth.

https://www.rfcafe.com/references/calculators/skin-depth-calculator.htm

in this link i use pcb RO4350B it say resistivity = 1.2 x 10^10 M*ohm*cm

transfer to equation resistivity = 1.2 x 10^10 u*ohm*cm right?

it that true?

but i think resistivity = 0.012 u*ohm*cm.

Thank. :-D

 

[volker_muehlhaus]

RO4350B is the dielectric.

What you need for the skin depth is the conductivity of the metal plating -> copper.
Copper is listed in the table that you have linked to: 1.69 µΩ×cm.

 

[aunsteel]

oh!!! i see.

Copper
-------------------
RO4350B (dielectric)
--------------------
Copper

that right?

Thank you again... :-D

 

[volker_muehlhaus]

Yes, that's correct.

If you are interested in more details, here is a description of the copper foils for Rogers substrates:
**broken link removed**

 

[aunsteel]

thank you very much :-D