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.