Patent ID: 9024196
Filing Date: 2015-05-05
Classification: H05K

Abstract:
1. A printed circuit board having a differential signal transmission line comprising: parallel conductive traces forming a differential trace pair which forms a non-skew-adjusting portion making no skew adjustment; and meander traces forming a differential trace pair which forms a skew-adjusting portion making skew adjustment; wherein said skew-adjusting portion has two kinds of transmission line segments comprising a convex transmission line segment including a differential trace pair composed of parallel traces having a spacing greater than a spacing of the non-skew-adjusting portion and a concave transmission line segment including a differential trace pair composed of parallel traces having a spacing smaller than the spacing of the non-skew-adjusting portion; and wherein trace lengths of the parallel portions of said two kinds of transmission line segments having different differential trace pair spacings in said skew-adjusting portion are equal, and satisfy the following relationships: where S is a differential trace pair spacing of said non-skew-adjusting portion, S