after above place and route task, you need virtuoso or laker to merge cell layouts and do some editing. + `: v1 x3 @6 Wclean up LVS/DRC/ERC/ESD violations with calibre or (hercules, assura) tools.
1. magma is another solution) Y+ M7 \+ T5 m; P# F
2. Astro from synopsys7 y3 B+ [9 H x3 ?1 ]# I* Y' k% g
3. FirstEncounter from Cadence+ X; n! C/ @0 D
# `. y2 v. Q8 B! {" f
All with basic DRC and LVS, you have to run Calibre, etc. to finish the final verification.