One embodiment of the present invention provides an arrangement of
differential pairs of wires that carry differential signals across a
semiconductor chip. In this arrangement, differential pairs of wires are
organized within a set of parallel tracks on the semiconductor chip.
Furthermore, differential pairs of wires are organized to be non-adjacent
within the tracks. This means that each true wire is separated from its
corresponding complement wire by at least one intervening wire in the set
of parallel tracks, thereby reducing coupling capacitance between
corresponding true and complement wires. Moreover, this arrangement may
include one or more twisting structures, wherein a twisting structure
twists a differential pair of wires so that the corresponding true and
complement wires are interchanged within the set of parallel tracks.