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QRC extract - parasitic resistors always scaled

RobinCommander

I have been running QRC extract for EM/IR analysis but I am finding the parasitic metal resistors in the extracted dspf netlist are always coming out  scaled not the drawn width. Setting 'Parasitic Resistance Width' in the Netlisting tab to 'drawn' 1um drawn width comes out 0.9um wide in dspf. The process has a 10% shrink but at the moment the EMIR files are setup assuming drawn dimensions.

Any suggestions to where this scaling is happening?

Parents

  • Hi RobinCommander

    Prior to EXT14.12, QRC will always scaled the drawn width of a parasitic resistor if the ictfile contains a shrink factor. From EXT14.12, there is a new option to avoid this scaling.  The CCL cmd is as follows:

    output_db \
    -type dspf \
    -include_parasitic_res_parameters_unscaled true

    You can use this new feature if you switch to the latest version EXT14.21. Alternatively, you can post process the generated dspf netlist using a perlscript.

    Best regards
    Quek

Reply

  • Hi RobinCommander

    Prior to EXT14.12, QRC will always scaled the drawn width of a parasitic resistor if the ictfile contains a shrink factor. From EXT14.12, there is a new option to avoid this scaling.  The CCL cmd is as follows:

    output_db \
    -type dspf \
    -include_parasitic_res_parameters_unscaled true

    You can use this new feature if you switch to the latest version EXT14.21. Alternatively, you can post process the generated dspf netlist using a perlscript.

    Best regards
    Quek

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