Materiales for Stackup

[Bermell]

How important do you consider the materials for your stackup configuración?

I mean, you don't need to select them for impedance calculations, for example

Thank you very much

[qdrives]

You DO need them for impedance calculation.

[Bermell]

Thank you qdrives for your answer. I calculate the controlled impedance, using the excellent Sierra software.

Please, check the picture attached. As you can see, i can't select the material, in the Sierra program
Thank you very much

[Bermell]

I think the following link can help

https://www.protoexpress.com/kb/pcb-material-selection/

[qdrives]

That is the picture from the presentation.
If you click on the "Try this tool" button and wait for about 1 minute... it opens the tool.

[robertferanec]

I think, you will need to select materials (or predefined / recommended stackups by sierra circuit) somewhere. I tried that tool once a while ago and I think that was the case. As qdrives mentioned, materials need to be specified for impedance calculation.