Chapter 12. Global and detailed routing
About This Chapter
After placement, the routing process determines the precise paths for nets on the chip layout to interconnect the pins on the circuit blocks or pads at the chip boundary. These precise paths of nets must satisfy the design rules provided by chip foundries to ensure that the designs can be correctly manufactured. The most important objective of routing is to complete all the required connections (i.e., to achieve 100% routability); otherwise, the chip would not function well and may even fail. Other objectives, such as (1) reducing the routing wirelength and (2) ensuring each net to satisfy its required timing budget, have become essential for modern chip design. For modern large-scale ...
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