Advanced Member level 2
Hi, the text book says that "the use of lower dielectric constant material will decrease the cross talk for the same characteristic impedance". The most commonly dielectric material used in the pcb is FR4 with dielectric constant around 4. Which dielectric materials have lower dielectric constant and how much they are expansive compared to FR4. Any example of high speed pcd design in which it is really important to use lower dielectric material constant instead of FR4 ?