Automatic routing system with variable width interconnect

摘要

A system automatically routes interconnect of an integrated circuit design using variable width interconnect lines. For example, a first automatically routed interconnect may have a different width from a second automatically routed interconnect. The system will vary the width of the interconnect lines based on certain factors or criteria. These factors include current or power handling, reliability, electromigration, voltage drops, self-heating, optical proximity effects, or other factors, or combinations of these factors. The system may use a gridded or a gridless (or shape-based) approach.

主权项

1. An electronic design automation system comprising:
a database of an integrated circuit design; a mouse input device; a graphical user interface tool, capable of accessing and performing operations on the database, based on input from the mouse input device; and an automatic shape-based router tool, capable of accessing the database, using a batched greedy algorithm to create an interconnect route path for a first net of the integrated circuit design, selected using the graphical user interface tool and the mouse, wherein the interconnect route path comprises segments having different interconnect widths, the automatic shape-based router tool creates a second net of the integrated circuit design, wherein the second net has a spacing so that the second net is spaced at least a first distance from the first net, and the automatic shape-based router tool creates a third net of the integrated circuit design, wherein the third net has a spacing so that the third net is spaced at least a second distance from the first net, wherein the second distance is less than the first distance.