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 How to get entire net in layout 

Last post Tue, Dec 25 2012 9:50 PM by Sarvani. 8 replies.
Started by Sarvani 24 Dec 2012 02:04 AM. Topic has 8 replies and 1498 views
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  • Mon, Dec 24 2012 2:04 AM

    • Sarvani
    • Top 75 Contributor
    • Joined on Mon, Mar 12 2012
    • VIZAG, Andhra Pradesh
    • Posts 112
    • Points 1,920
    How to get entire net in layout Reply

     Hi all,

               I need to get entire net in a layout(Power plot) . For example If I specified net name 'VDD' then it will take all layers which are connected to VDD net and copy them in new layout. Please suggest me about this.

    Thank You,

    Sarvani.

    • Post Points: 20
  • Mon, Dec 24 2012 2:22 AM

    Re: How to get entire net in layout Reply
    Version?

    You can do this in IC615 with Mark Net.

    Andrew
    • Post Points: 20
  • Mon, Dec 24 2012 2:33 AM

    • Sarvani
    • Top 75 Contributor
    • Joined on Mon, Mar 12 2012
    • VIZAG, Andhra Pradesh
    • Posts 112
    • Points 1,920
    Re: How to get entire net in layout Reply

    Sorry, I am using IC 6145 version. Is there any chance to get that in this version? Or let me know if any command related to extract a net in layout. So that I can built a code using that command as per my requirement.

    • Post Points: 20
  • Mon, Dec 24 2012 3:24 AM

    Re: How to get entire net in layout Reply

     This is supported in IC614 too (not that there is any good reason to keep using IC614 now; IC615 doesn't require a database migration, and IC614 has not been supported for some considerable time now). Connectivity->Nets->Save All Mark Nets.

    You could of course do it using your favourite physical verification tool to extract the net and then save the shapes to a database. You can do this with Diva, Assura, PVS, Dracula, Calibre etc, etc.

    Mark Net may be sufficient - it depends on how big the cellView is. You may also need to set up Mark Net "Stop Layers" (hit F3 once you start Mark Net) to stop it marking the connectivity between source and drain under the gate.

    Andrew.

    • Post Points: 20
  • Mon, Dec 24 2012 3:42 AM

    • Sarvani
    • Top 75 Contributor
    • Joined on Mon, Mar 12 2012
    • VIZAG, Andhra Pradesh
    • Posts 112
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    Re: How to get entire net in layout Reply

     Thank you very much Andrew, I have used marknet option. I got the Power plot net which I want. Please let me know how can I get this in IC 5141 version?

     

    • Post Points: 20
  • Mon, Dec 24 2012 3:56 AM

    Re: How to get entire net in layout Reply
    You can't. Saving of mark net info was new in IC61 (IC614, I think).

    Andrew
    • Post Points: 20
  • Mon, Dec 24 2012 4:09 AM

    • Sarvani
    • Top 75 Contributor
    • Joined on Mon, Mar 12 2012
    • VIZAG, Andhra Pradesh
    • Posts 112
    • Points 1,920
    Re: How to get entire net in layout Reply

    Then we have to copy all marked layers to new layout. How can I get those layers beyond marked layers? 

    As per your second suggition I can run it too caliber by writing rule file.

    • Post Points: 20
  • Mon, Dec 24 2012 4:16 AM

    Re: How to get entire net in layout Reply
    You can't do that - I already said that. There is no mechanism to get the marked shapes.

    In IC5141 you'll have to use a physical verification extraction tool (or write your own shape chaser, which is non-trivial, especially if you want good performance for large data).

    Andrew
    • Post Points: 20
  • Tue, Dec 25 2012 9:50 PM

    • Sarvani
    • Top 75 Contributor
    • Joined on Mon, Mar 12 2012
    • VIZAG, Andhra Pradesh
    • Posts 112
    • Points 1,920
    Re: How to get entire net in layout Reply

    Thanks Andrew, Your suggitions helps me alot.  Now I have done this with physical verification code also(Caliber).

    • Post Points: 5
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Started by Sarvani at 24 Dec 2012 02:04 AM. Topic has 8 replies.