| 摘要 |
A technique is described for enabling routing of metallisation wires over sensitive cells of an integrated circuit by means of a global router after the cell circuits have been designed. At least one cell includes dedicated route paths (32, 36, 40, 46) as part of the cell design. The paths may include alternative paths (32 and 36), and concurrently usable paths (40 and 46). By including the routes as part of the cell design, the subsequent problems of a global routing tool routing wires over sensitive areas of the cell can be avoided, and the number of wire routes can be controlled. The global router operates by detecting whether dedicated routes are provided and, if so, identifying the entry/exit points for routes to be used.
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