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 Like to extract Some layout nets new layout (new Cell) 

Last post Wed, Jan 13 2010 4:23 PM by Quek. 6 replies.
Started by Satya 08 Jan 2010 11:01 AM. Topic has 6 replies and 4356 views
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  • Fri, Jan 8 2010 11:01 AM

    • Satya
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    Like to extract Some layout nets new layout (new Cell) Reply

    Hi All!!

     I would like to extract metal nets routing info  like x,y etc to another cell(layout) by keeping sub blocks as Black box. Please any one suggest some idea to do it.

     Thanks in Advance,

    Satya

     

    • Post Points: 20
  • Fri, Jan 8 2010 11:17 AM

    • Quek
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    Re: Like to extract Some nets layout view to a Cell Reply
    Hi Satya

    I don't quite understand the question. Do you mean that you would like to copy existing top level metal interconnects from one layout to another layout and to create blackbox layouts for the subcells?

    Best regards
    Quek
    • Post Points: 20
  • Fri, Jan 8 2010 1:23 PM

    • Satya
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    Re: Like to extract Some nets layout view to a Cell Reply

    Hi Querk !!

    Thanks for your reply, Yes Its like that only...  

    Also If I  would like to copy one or two metal net from top to bottom also is possible? if yes How can I do it?

     Thanks and regards,

    Satya

    • Post Points: 20
  • Sun, Jan 10 2010 6:41 PM

    • Quek
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    Re: Like to extract Some nets layout view to a Cell Reply
    Hi Satya

    I am thinking that the following should be close to what you want:
    a. Use dbSave to create a copy of the top layout
    b. For each of the subcells, find the cellview bounding box, create an empty layout and create a prBoundary layout that has the size of the bBox
    c. Replace each subcell with the empty layout using leReMasterInstances

    Getting the pin part seems a bit difficult. Creating blackboxes with the correct pin layers and locations don't seem to be very straight-foreward.

    >>>like to copy one or two metal net from top to bottom also is possible
    Do you mean that you want to push the top level routing to a subcell?

    Actually if your purpose is to do lvs verification on top level and treat all subcells as blackboxes, this can be easily done using the original layout. You can simply declare all the subcells as blackboxes in the lvs cmd file.

    Would you please explain the purpose of creating such a layout?

    Thanks
    Quek
    • Post Points: 35
  • Mon, Jan 11 2010 1:27 PM

    • Satya
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    Re: Like to extract Some nets layout view to a Cell Reply

    Hi Querk!!

    Thanks man..I would like to copy some critcal nets or VDD/GND nets to different cell to verify manually...

    Thanks,

    Satya

    • Post Points: 5
  • Mon, Jan 11 2010 1:32 PM

    • Satya
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    Re: Like to extract Some nets layout view to a Cell Reply

    Hi Querk!!

     purpose is  to manually inspcet some Critical nets and VDD/GND routing .

    I hope now you can guide me to do better.

    Thanks,

    Satya

    • Post Points: 20
  • Wed, Jan 13 2010 4:23 PM

    • Quek
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    Re: Like to extract Some nets layout view to a Cell Reply

    Hi Satya

    Thanks for the info. Actually I don't have any more comments on this question. I am really not sure if it is necessary to create the layout for the purpose of manual examination. Perhaps it might be good to review your objectives. : )

    Best regards
    Quek

    • Post Points: 5
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Started by Satya at 08 Jan 2010 11:01 AM. Topic has 6 replies.