LVS Documentation

Explains how to use the runset.

Folder Structure

📦runset
 ┣ 📦testing
 ┣ 📜README.md
 ┣ 📜gf_018mcu.lvs
 ┣ 📜gf_018mcu.lyp
 ┗ 📜run_lvs.py

Rule Deck Usage

The run_lvs.py script takes a gds file and a netlist to run LVS rule deck of GF180 technology with switches to select subsets of all checks.

Switches

1. GF180MCU=A : combined options of metal_level=3, mim_option=A, metal_top=30K, poly_res=1K, and mim_cap=2
2. GF180MCU=B : combined options of metal_level=4, mim_option=B, metal_top=11K, poly_res=1K, and mim_cap=2
3. GF180MCU=C : combined options of metal_level=5, mim_option=B, metal_top=9K, poly_res=1K, and mim_cap=2

Usage

    run_lvs.py (--help| -h)
    run_lvs.py (--design=<layout_path>) (--net=<netlist_path>) (--gf180mcu=<combined_options>) [--thr=<thr>] [--run_mode=<run_mode>] [--metal_top=<metal_top>] [--mim_option=<mim_option>] [--metal_level=<metal_level>] [--poly_res_val=<res_val>] [--mim_cap_val=<cap_val>] [--no_net_names] [--set_spice_comments] [--set_scale] [--set_verbose] [--set_schematic_simplify] [--set_net_only] [--set_top_lvl_pins] [--set_combine] [--set_purge] [--set_purge_nets]

Example:

    python3 run_lvs.py --path=testing/extraction_checking/sample_nmos_3p3.gds --net=sample_nmos_3p3.spice --thr=16 --gf180mcu=B --set_verbose --set_spice_comments

Options

--help -h Print this help message.

--design=<layout_path> The input GDS file path.

--net=<netlist_path> The input netlist file path.

--thr=<thr> The number of threads used in run.

run_mode=<run_mode> Select klayout mode Allowed modes (flat , deep, tiling). [default: flat]

--gf180mcu=<combined_options> Select combined options of metal_top, mim_option, and metal_level. Allowed values (A, B, C).

--no_net_names Discard net names in extracted netlist.

--set_spice_comments Set netlist comments in extracted netlist.

--set_scale Set scale of 1e6 in extracted netlist.

--set_verbose Set verbose mode.

--set_schematic_simplify Set schematic simplification in input netlist.

--set_net_only Set netlist object creation only in extracted netlist.

--set_top_lvl_pins Set top level pins only in extracted netlist.

--set_combine Set netlist combine only in extracted netlist.

--set_purge Set netlist purge all only in extracted netlist.

--set_purge_nets Set netlist purge nets only in extracted netlist.

LVS Outputs

Final results will appear at the end of the run logs.

The output files are :

1. An extracted netlist (<your_design_name>.cir).

2. Database file (<your_design_name>..lvdb) for comparison results. you could view it on your file using klayout.