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Stacked Vias

Davadaroo Baba

Hi,

I am interested to know if these's a way to create a stacked VIA, say a stack of VIA4 & VIA5 in a 6 metal process.

I am interested to know  how do I add this Stack VIA in the technology file? Can I add it to the tech file throught an API like the CreateStdVia & the CreateCustomVia? Or should I specify it in a constarain group entry(desired one),

I need Via4 & VIA5 placed one over the other.

 

Thanks in Advance.

 

Krish

 

  • Hello Andrew,

    Is it possible to create and place such a stacked via using Skill?

    Thanks and regards,

    Adi

  • Adi,

    The forum guidelines ask you not to post on the end of old threads - the thread you posted on was 7 years old...

    There is (in IC617 - at least in recent versions) viaGenerateViasAtPoint() which should (I think) be able to do this - note that the functions with a "via" prefix can't be used in PCells. Otherwise you'd have to create the vias using dbCreateVia() for each via in the stack.

    Regards,

    Andrew.

  • Thanks a lot Andrew. I admit I hadn't gone through the guidelines. I will follow them in the future :).
    I was able to solve my problem.

    Best regards,
    Adi
  • in reply to Andrew Beckett

    HI Andrew,

              There is any skill code for via to via conversion i.e;m2_m1c to m3_m2c.So please let me know is there any solution for it  and we are using virtuoso  6.1.6-64bit version.

    Thanks in advance,

    Prabhu kumar.A.

  • in reply to Prabhu kumar

    Clearly you didn't read the forum guidelines as you posted in the middle of an 8 year old thread with a question that was only tangentially related to the original question. That said, I'll forgive  you as I see that they don't seem to be pinned to the top of the list of posts any more (I'll check why).

    If you're asking about replacing one via with a different one, you have to delete and recreate the via (presumably with similar parameters). There's no built-in function to do that (as far as I know) and I've not written one myself. Of course you can delete (using dbDeleteObject()) and recreate (using dbCreateVia), but nothing to do all of this automatically in one shot.

    Regards,

    Andrew.

  • in reply to Andrew Beckett
    Andrew Beckett said:
    Clearly you didn't read the forum guidelines as you posted in the middle of an 8 year old thread with a question that was only tangentially related to the original question. That said, I'll forgive  you as I see that they don't seem to be pinned to the top of the list of posts any more (I'll check why).

    We've fixed the pinned posts so that the forum guidelines now are at the top of each forum. So there's no excuse for anyone not reading them now ;-)

    Regards,

    Andrew.

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