DRC Documentation

Explains how to use the runset.

Folder Structure

📦drc
 ┣ 📦testing
 ┣ 📜GF180_MCU.lyp
 ┣ 📜README.md
 ┣ 📜gf_018mcu.drc
 ┣ 📜gf_018mcu_antenna.drc
 ┣ 📜gf_018mcu_density.drc
 ┗ 📜run_drc.py

Rule Deck Usage

The run_drc.py script takes a gds file to run DRC rule decks of GF180 technology with switches to select subsets of all checks.

Switches

1. FEOL : Default is on. Use it for checking Front End Of Line layers (wells, diffusion, polys, contacts).
2. BEOL : Default is on. Use it for checking Back End Of Line layers (metal layers, top metal layer, vias).
3. BEOL : Default is on. Use it for checking Back End Of Line layers (metal layers, top metal layer, vias).
4. GF180MCU=A : combined options of metal_level=3, mim_option=A, metal_top=30K, poly_res=1K, and mim_cap=2
5. GF180MCU=B : combined options of metal_level=4, mim_option=B, metal_top=11K, poly_res=1K, and mim_cap=2
6. GF180MCU=C : combined options of metal_level=5, mim_option=B, metal_top=9K, poly_res=1K, and mim_cap=2
7. connectivity : Default is off. Use it for check connectivity rules.
8. DENSITY : Default is off. Use it for check density rules.
9. DENSITY_only : Default is off. Use it for check density rules only.
10. ANTENNA : Default is off. Use it to turn on Antenna checks.
11. ANTENNA_only : Default is off. Use it to turn on Antenna checks only.
12. OFFGRID : Default is on. Use it for checking off-grid and acute layers (ongrid of 0.005um and angles 45 deg. unless otherwise stated).

Usage

    run_drc.py (--help| -h)
    run_drc.py (--path=<file_path>) (--gf180mcu=<combined_options>) [--topcell=<topcell_name>] [--thr=<thr>] [--run_mode=<run_mode>] [--no_feol] [--no_beol] [--connectivity] [--density] [--density_only] [--antenna] [--antenna_only] [--no_offgrid]

Example:

    python3 run_drc.py --path=testing/switch_checking/switch_checking.gds --thr=16 --run_mode=flat --gf180mcu=A --antenna --no_offgrid

Options

--help -h Print this help message.

--path=<file_path> The input GDS file path.

--gf180mcu=<combined_options> Select combined options of metal_top, mim_option, and metal_level. Allowed values (A, B, C). gf180mcu=A: Select metal_top=30K mim_option=A metal_level=3LM gf180mcu=B: Select metal_top=11K mim_option=B metal_level=4LM gf180mcu=C: Select metal_top=9K mim_option=B metal_level=5LM

--topcell=<topcell_name> Topcell name to use.

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

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

--no_feol Turn off FEOL rules from running.

--no_beol Turn off BEOL rules from running.

--connectivity Turn on connectivity rules.

--density Turn on Density rules.

--density_only Turn on Density rules only.

--antenna Turn on Antenna checks.

--antenna_only Turn on Antenna checks only.

--no_offgrid Turn off OFFGRID checking rules.

DRC Outputs

Results will appear at the end of the run logs.

The result is a database file (<your_design_name>.lyrdb) of all violations in the same directoy of your design. you could view it on your file using klayout.