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LVS mismatch

myjan

Please help me with this issue, When I ran LVS in my design i see this message, I am tried to solve this issue.( Design FinFet 18nm design process).Please help me fixed this issue.

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  • Marc Heise
    LVS tries to map layout pins/nets/devices to their schematic counterparts. In above report it obviously can't find two devices on the schematic side to match the layout.
    Maybe these are dummy devices which are not in the schematic? Either add them to the schematic or mark them as "dummy" in the layout. Usually there is a flag which can be set to ignore the device when the layout netlist is created. ( Try a right click on the M0/M2 device entry in the navigator assistant on the layout side, in the popup menu there should be a "mark as dummy" entry or something similar)
    But this is just a guess. For a more serious evaluation it would be helpful to see the schematic and layout netlists.
Reply
  • Marc Heise
    LVS tries to map layout pins/nets/devices to their schematic counterparts. In above report it obviously can't find two devices on the schematic side to match the layout.
    Maybe these are dummy devices which are not in the schematic? Either add them to the schematic or mark them as "dummy" in the layout. Usually there is a flag which can be set to ignore the device when the layout netlist is created. ( Try a right click on the M0/M2 device entry in the navigator assistant on the layout side, in the popup menu there should be a "mark as dummy" entry or something similar)
    But this is just a guess. For a more serious evaluation it would be helpful to see the schematic and layout netlists.
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