LTX - a system for the directed automatic design of LSI circuits
DAC '76 Proceedings of the 13th Design Automation Conference
DAC '76 Proceedings of the 13th Design Automation Conference
DAC '82 Proceedings of the 19th Design Automation Conference
DAC '87 Proceedings of the 24th ACM/IEEE Design Automation Conference
A multi-layer router utilizing over-cell areas
DAC '90 Proceedings of the 27th ACM/IEEE Design Automation Conference
Constrained via minimization with practical considerations for multi-layer VLSI/PCB routing problems
DAC '91 Proceedings of the 28th ACM/IEEE Design Automation Conference
DAC '91 Proceedings of the 28th ACM/IEEE Design Automation Conference
Minimizing External Wires in Generalized Single-Row Routing
IEEE Transactions on Computers
A new efficient approach to multilayer channel routing problem
DAC '92 Proceedings of the 29th ACM/IEEE Design Automation Conference
A multi-layer channel router with new style of over-the-cell routing
DAC '92 Proceedings of the 29th ACM/IEEE Design Automation Conference
New models for four- and five-layer channel routing
DAC '92 Proceedings of the 29th ACM/IEEE Design Automation Conference
Routing in a Three-Dimensional Chip
IEEE Transactions on Computers
A general graph theoretic framework for multi-layer channel routing
VLSID '95 Proceedings of the 8th International Conference on VLSI Design
Computing area and wire length efficient routes for channels
VLSID '95 Proceedings of the 8th International Conference on VLSI Design
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In this paper we present two n-layer channel routing algorithms that guarantee successful routing of the channel for n greater than three. The first is linear and optimal given a VHV …HV assignment of layers. The second, using an HVH…VH layer assignment, is quasilinear and performs optimally on examples from the literature. Except in pathological cases, we expect the latter router to perform within one row of optimal. For comparison with published examples we implemented the second router in five and three layers. The five-layer implementation routed all examples optimally while the three-layer implementation routed the examples with the same or fewer rows than the published examples. With its n-layer capability this channel router will allow channel routing to be used when more than three layers are available. This router can also be used to evaluate the utility of additional layers.