[SOLVED] FR4 dielectric constant/ permittivity vs. temperature

elberlee · Sep 13, 2013

Hi, all,

Can any some give me some details data of the correlation between FR4 dielectric constant (Dk) vs. temperature? Such as data sheet or a curve?

I had tried to google it, but i did not find any numbers. I need these different Dk numbers of different temperatures in simulation.

Thanks in advance!

Elber

biff44 · Sep 13, 2013

FR4 means different things to different manufacturers! The best thing would be to build a structure on the same material you intend to use, and measure it drift over temperature.

vfone · Sep 14, 2013

From 0 to 100 Celsius there are just slightly variation of dielectric constant vs temperature:

http://www.ieee802.org/3/ap/public/may04/goergen_01_0504.pdf

http://ecadigitallibrary.com/pdf/55thECTC/55ECTC285_cpt.pdf

mvs sarma · Sep 14, 2013

And perhaps thickness of the copper clad used.

elberlee · Sep 14, 2013

Thanks Vfone,

these document is really helpful!

Elber

[SOLVED] FR4 dielectric constant/ permittivity vs. temperature

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