The paper presents a review of the causes of phase shift formation in differential communication lines. A zigzag tracing method with an angle of 12° is proposed to compensate for the inhomogeneity of the glass fabric. A method for calculating the formation of skew in the length of conductors at turns with and without rounding is presented.

Keywords: differential pair, differential communication lines, signal phase shift, static skew, dynamic skew, delay, back drilling, non-uniformity effect, fiberglass weave, layout