Robust optimization of PCB differential-via for signal integrity

This paper describe a electromagnetic optimization technique using Taguchi´s method. Taguchi´s method was developed on the basis of the orthogonal array (OA) concept, which offers systematic and efficient characteristics. In manufacturing, the dielectric constant of High-speed PCB´s dielectric material is uncontrollable factor. The paper carries out a comprehensive study of the impacts of the different dielectric constant in various differential-via design parameters on signal integrity (SI) using DOE of Taguchi method. To optimize the differential-via´s parameters so that there is small effect on SI in different dielectric material.