Abstract—In VLSI design, one of the most important detailed routings is the channel routing. Given a channel with length n in 2-layer Manhattan model, Szeszler proved that the width (number of tracks required for routing) of the channel is at most 7/4n, and this upper bound can be achieved by a linear time algorithm. In this note, we improve the upper bound 7/4n to 3/2n, which also can be achieved by a linear time algorithm.
Keywords—Channel routing, Graph Theory, VLSI design.
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