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techFile: Spacings constraint warning

kb how

Hi,

I was trying to construct techfile for layer ("RH" "drawing1") with minWidth or 0.36, but failed with below warning. The warning message indicated that the layer with purpose is not supported. Unfortunately, the constraint only apply on layer RH with drawing1 purpose. Enclosing some info as below (IC614.500.11)

techFile:

constraintGroups( ( "foundry" spacings( ( minWidth ("RH" "drawing1")  0.36   'description "minWidth RH"))))

 

CIW warning message:

*WARNING* (TECH-230014): techiSetLayerCst: In constraint group "foundry", constraint "minWidth" for layer "RH" uses custom purpose "drawing1".
                         Tools that follow strictly OpenAccess data usage intent might not support it.

I read through the document as found that this is the correct way in adding constaint spacing rule with layer and purpose. Please correct me if i'm wrong.

-How-

 

Parents

  • Hi Derek,

     Thanks for the reply. Now i only know the lpps support in Cadence Virtuoso.

    By the way, if the layer with different purpose is needed and different constraint rule is apply. Will that causing any conflict? From what i have/tested, even though it prompts warning message during the techFile loading, the constraint rule that i set in the techFile is still valid (lpp). It is advisable for me to continue?

    Thanks a lot. :)

Reply

  • Hi Derek,

     Thanks for the reply. Now i only know the lpps support in Cadence Virtuoso.

    By the way, if the layer with different purpose is needed and different constraint rule is apply. Will that causing any conflict? From what i have/tested, even though it prompts warning message during the techFile loading, the constraint rule that i set in the techFile is still valid (lpp). It is advisable for me to continue?

    Thanks a lot. :)

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