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VTH_P/VTH_N implant spacinfg rule violation prevention/fix

DavidBD

 Hello,

I and encounting a DRC rule violation related to VTH_N/VTH_P implant spacing rule.

I found that SOC have special placement flag to handle this rule  :

setPlaceMode -honorImplantSpacing true

When I use it I got the following error :

 **WARN: (SOCSP-300):    No layer1-to-layer2 spacing rule specified for any Implant
        layer in-use. Ignoring  'honorImplantSpacing' option.

Attched is the related LEFrule :

LAYER VTH_P
    TYPE IMPLANT ;
    WIDTH 0.18 ;
    SPACING 0.18 ;
END VTH_P

LAYER VTH_N
    TYPE IMPLANT ;
    WIDTH 0.18 ;
    SPACING 0.18 ;
END VTH_N

Can you please advice if SOC can prevent this violation ?

Thanks,

David

 

Parents

  •  Hi David,

    It looks like you need another line in each implant layer's definition in the LEF. Something like:

    LAYER VTH_P
        TYPE IMPLANT ;
        WIDTH 0.18 ;
        SPACING 0.18 ;
        SPACING 0.18 LAYER VTH_N ;
    END VTH_P

    The warning is telling you that a spacing rule between the two implant layers is what's missing.

    Hope that helps,

    - Kari

Reply

  •  Hi David,

    It looks like you need another line in each implant layer's definition in the LEF. Something like:

    LAYER VTH_P
        TYPE IMPLANT ;
        WIDTH 0.18 ;
        SPACING 0.18 ;
        SPACING 0.18 LAYER VTH_N ;
    END VTH_P

    The warning is telling you that a spacing rule between the two implant layers is what's missing.

    Hope that helps,

    - Kari

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