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optDesign removes fillers

Johann Glaser

HI!

I'm using the Foundation Flow for a flat design. While running all steps I find that "route" uses addFiller to fill the core area with filler cells. Opening the database with the GUI shows that it really contains these filler.

The next step "postroute" uses optDesign -postRoute which removes all fillers again. There is no later place where these fillers would be added again.

Could you please help me to persuade optDesign to let my fillers alone? :-)

Thanks

  Hansi

Parents

  •  You might try looking at the documentation for the command "setFillerMode". This command tells Encounter which filler cells to use for the design. Then when optDesign is run, it will remove the existing fillers in order to make room for optimization buffers but also it will replace fillers automatically at the end of the optimization stage.

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  •  You might try looking at the documentation for the command "setFillerMode". This command tells Encounter which filler cells to use for the design. Then when optDesign is run, it will remove the existing fillers in order to make room for optimization buffers but also it will replace fillers automatically at the end of the optimization stage.

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