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LayoutXL stop layers

PNadeau

Dear folks,

I am running in to a lot of false shorts in LayoutXL connectivity. Using the LayoutXL Options -> Connectivity -> Diagnostics Report, it seems because my PDK's tech file does not define the stop layers in any of the constraint groups.  

Does anyone know of a reasonably straightforward way of defining a simple stop layer (like diffusion interacting with poly) so that I could get this working on my own?

I am familiar with the Process Rule Override, but I do not see a stop layer option here.  I also see the Incremental Tech DB flow might be an option, but I'm wondering if there is a simpler or better way?

Cheers,

Phil 

Parents

  • So you mean being able to do something like is described in the Virtuoso Layout Suite XL User Guide in the section Specifying Stop Layers in the validLayers Constraint ? It gives an example:

    Consider the following derived layer definitions in the validLayers constraint:

    (StoppedLayer 10001 (Oxide 'not Poly))
    (validLayers (StoppedLayer))

    The "StoppedLayer" is not a constraint - it needs to be defined in the techDerivedLayers section of the layerDefinitions section.

    So if this is what you mean, then Incremental Tech DB is the way to go, I think.

    Regards,

    Andrew.

Reply

  • So you mean being able to do something like is described in the Virtuoso Layout Suite XL User Guide in the section Specifying Stop Layers in the validLayers Constraint ? It gives an example:

    Consider the following derived layer definitions in the validLayers constraint:

    (StoppedLayer 10001 (Oxide 'not Poly))
    (validLayers (StoppedLayer))

    The "StoppedLayer" is not a constraint - it needs to be defined in the techDerivedLayers section of the layerDefinitions section.

    So if this is what you mean, then Incremental Tech DB is the way to go, I think.

    Regards,

    Andrew.

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