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Summary

The final table, which always appears, is the summary. This will report nonassociations, and will indicate whether the cell passed or failed the LVS test.

A pass indication is reported for a cell if all of the following are true:

  1. All electrical nets, devices, and subcircuits are associated, meaning that Xic has identified the corresponding object in the physical layout.
  2. No associated physical device or subcircuit is connected to an unassociated group.
  3. No unassociated physical device or subcircuit has a connection to an associated group other than the ground group (0).
  4. Parameter value comparisons between corresponding electrical and physical devices match.

Note that having unassociated physical groups, devices, or subcircuits does not automatically cause failure. Unassociated groups (random pieces of conductor material) do no harm, but all groups connected to associated devices or subcircuits must be associated (have a corresponding node in the schematic). It is also possible to have unassociated physical devices or subcircuits, but none of these can have a connection to associated groups other than the ground group (the ground group is used when a ground plane layer is specified). Thus, the physical layout can have structure not represented in the schematic, but only if this structure is topologically disjoint from the associated circuit.


next up previous contents index
Next: The Extract C Button: Up: LVS Output File Format Previous: Checking per-group/node terminal references   Contents   Index
Stephen R. Whiteley 2017-04-09