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AbstractBlockageCoverLayers on not flatten memory instance

samung
Hello,

I would like to understand better the AbstractBlockageCoverLayers function in Abstract generator Tool, step Abstract (Blockage).

absSetBinOption("Core" "AbstractBlockageCoverLayers" "M1 M2X M3X ")


Actually, I would like to define some blockages, let's say I have my "memory instance" layout up to MX, so it means the vdd/vss are in MX, but there are some layers from M1 to MX-1 in the "memory instance". 
The access pins are located at the edges of the "memory instance".

I would like to generate an ABSTRACT view as follow : "cover blockage" for M1 to MX-1 and "Detailed Blocakge" for MX.


When I generate the ABSTRACT view, I just have : the MX layer, I don't have the other Metal cover layers.

My input : the "memory instance" layout up to MX (meaning that with Virtuoso Layout Eiditng, i see all the metal layers), but the "memory instance" is not flatten (meaning that it is made of different cells : array_blxxx cell, master control cell ...).


So, do I have to do a flatten of all the "memory instance" cells to be able to generate the different metal cover layers in the ABSTRACT view or is there another way ?

Thanks !!

P.
 
PS :
 
tool version : IC6.1.5-64b.500.9
xxx/cadence_amsams2010.2c_mmsim/lnx/tools/dfII/bin/abstract 
Parents

  •  Hi,

    You do not need to flatten any subcells.

    This sounds like a similar problem you already posted. (subcells not readable) which I already answered.

    But, I believe the tool should still be able to generate cover blockages at the top level even if you  have problems reading the subcells.

    Do you have a prBoundary for your top-level cell?

    If not, you can create it with create->prObjects->prBoundary in Virtuoso.

     

    The tool should then create cover obstructions correctly from the prBoundary object dimensions.

     

    Colin

Reply

  •  Hi,

    You do not need to flatten any subcells.

    This sounds like a similar problem you already posted. (subcells not readable) which I already answered.

    But, I believe the tool should still be able to generate cover blockages at the top level even if you  have problems reading the subcells.

    Do you have a prBoundary for your top-level cell?

    If not, you can create it with create->prObjects->prBoundary in Virtuoso.

     

    The tool should then create cover obstructions correctly from the prBoundary object dimensions.

     

    Colin

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