Endcap (boundary) cell
Beginner
A cap placed at the start and end of every row, like bookends, to finish the row properly.
Novice
A small cell with no logic placed at both ends of every row and along the edges of large blocks, to finish off the rows.
Expert
LEF CLASS ENDCAP PRE/POST. Inserted with the taps before placement and FIXED. Advanced nodes add corner and edge variants around macros and row ends.