The PCB base materials specifications show many parameters, Tg, CTE, W/mK, copper thicknesses, moisture absorption, Dk, Df, Rf performance. Often the base material supplier gives only the comparison between his materials. But which of these material properties are important the make the optimal choice for your application, taken in account multiple vendors? Which choices have to be made to construct an optimal impedance controlled board?
Boy van Veghel, Fineline QPI