3
Net-Based Pre-Coloring Flow
In the schematic view, critical nets are identified and placed in a net class. Pre-coloring and spacing constraints are assigned to a reflexive constraint group (Within Group) for the net class.
The pre-coloring and spacing constraints from the schematic for the net class must be propagated to the layout to ensure that critical nets use the constraint settings for coloring in layout.
During stream out, shapes for the pre-colored nets are locked to their current color, based on the pre-coloring and spacing constraints.
For a video overview of this feature, see Using the Net-Based Pre-Coloring Flow on Cadence Online Support.
There must at least two masks set for a routing layer in the technology file.
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