WPE and end cap cell

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rdk28

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Hello all,

why end cap cell are used in design?
What is relation between end cap cell usage and well proximity effects?
 

Endcap cells are inserted to fullfill well tie off specifications for the cell rows. Endcaps dont have signal connectivity. They only have connectivity to power and ground distribution in the design. Endcaps have a fixed attribute and cannot be moved by optimization steps. Endcaps are placed at the end of cell rows and handle end of row well tie off requirement.

End Cap is used in PNR , Routing will not be done after End Cap.
They are placed in each row.
 

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