Product Documentation
Auto Device Placement and Routing Quick Help
Product Version IC23.1, September 2023

How to generate dummy fill?

To specify dummy fill options:

  1. Select one of the following options to specify the instance to be considered as the master for creating dummy fill.
    - Select Neighbor to create dummies that match the neighboring active devices. This option is selected by default.
    - Specify the Library, Cell, and View of the master cellview when Neighbor is not selected.
  2. Specify the Net Name to which the dummy fill must be connected.
  3. Select Match Neighbor to match the connectivity of the dummy devices to the bulk net of the neighbor. When unchecked and Net Name is blank, the dummy device terminals are not assigned any net unless they overlap (abut) an active device terminal to inherit its net.
  4. Select the required option from the Create Fill As section:
    - Multiple Instance mode inserts multiple dummy fill as per the setting of the dummyFillNeighborMultipleMode environment variable. When set to singleFinger, single-fingered multiple dummy instances are created. When set to exactCopy, dummies are created as exact copies of their neighboring instances.
    - Single Instance mode inserts each dummy fill as a single instance with multiple fingers to fill the gaps and empty rows.
  5. Select Enable Hierarchical Fill to look through the hierarchy to identify gaps that need to be filled.


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