DRC
===

Calibre DRC flow has been verified with Mentor Graphics Calibre version 2018.1_27.18.

These Calibre rule files are provided:

- s8_drcRules: General DRC
- s8_fillRules: Metal fill creation
- s8_latchupRules: Latch-up and antenna checks
- s8_luResRules: Latch-up resistor checks
- s8_softRules: Soft-connect and floating substrate / wells checks
- s8_stressRules: Sealring checks

A clean run with drcRules, softRules, stressRules, latchupRules, and luResRules is required for the top-level of every design.

The metal fill deck is provided for parasitic capacitance estimation and timing simulation; the final metal fill will be added at tapeout.

Calibre DRC can be run using the Calibre Interactive GUI from the Virtuoso layout window using these steps:

1. Launch Calibre Interactive nmDRC by choosing Run_nmDRC from the Calibre menu in the Virtuoso layout tool.
2. At “Rules -> DRC Rules File” enter “$PDK_HOME/DRC/Calibre/<rulefile_name>”.
3. To ensure that all checks are run, at “Rules -> Check Selection Recipe:” select “All checks”.
4. At “Inputs” press “Export from layout viewer”.
5. Click “Run DRC”.

Runset files are provided for all the rule files:

- $PDK_HOME/DRC/Calibre/s8_drc_runset
- $PDK_HOME/DRC/Calibre/s8_fill_runset
- $PDK_HOME/DRC/Calibre/s8_latchup_runset
- $PDK_HOME/DRC/Calibre/s8_lures_runset
- $PDK_HOME/DRC/Calibre/s8_soft_runset
- $PDK_HOME/DRC/Calibre/s8_stress_runset

These can be loaded by choosing “File -> Load Runset…” from the “Calibre Interactive – nmDRC” form. Each runset will:

- Load the appropriate rule file;
- Set the “Check Selection Recipe” to “All checks”;
- Turn on “Export from layout viewer” on the “Inputs” tab.