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Modified parameters don't change layout pcells

egolowen

Hi,

I am writing SKILL code in order to modify the parameters of layout instances, however even though the parameter has been properly modified, the layout pcell does not change (for example, if I increase the length of an nfet the property is the correct value but the layout instance remains the same size).

 I have tried using:
  foreach(prop properties
... 
prop~>value = param_value
...
)

and:
 dbReplaceProp(inst prop~>name 'string param_value)

But neither have fixed the issue.
Is there a better may to modify these parameters so the layout itself is updated properly? I was thinking of trying to use a replay file but that may not do the trick.

Thanks,
Elizabeth

Parents

  • Hi Andrew,

    Forgive me for my equivocal statements earlier. What i meant was - i am trying to find equivalent attribute for "sdMtlWidth" in my PDK. I can't find it neither in property edit form nor using its SKILL attribute so as to edit the S/D metal 1 width of  a MOS instance. 

    And to answer your other question about I using abInvokeInstCdfCallbacks(),  I get that error after i invoke that procedure using commands below

    instId=car(geGetSelSet())
    abInvokeInstCdfCallbacks(instId)

     after dbReplaceProp() for another parameter i think is CDF parameter and not at the time of loading abInvokeInstCdfCallbacks() procedure  itself. 

    Gratitude,

    Anand

Reply

  • Hi Andrew,

    Forgive me for my equivocal statements earlier. What i meant was - i am trying to find equivalent attribute for "sdMtlWidth" in my PDK. I can't find it neither in property edit form nor using its SKILL attribute so as to edit the S/D metal 1 width of  a MOS instance. 

    And to answer your other question about I using abInvokeInstCdfCallbacks(),  I get that error after i invoke that procedure using commands below

    instId=car(geGetSelSet())
    abInvokeInstCdfCallbacks(instId)

     after dbReplaceProp() for another parameter i think is CDF parameter and not at the time of loading abInvokeInstCdfCallbacks() procedure  itself. 

    Gratitude,

    Anand

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