A few digital projects in the Stanford EE 272B course are ha

Question

A few digital projects in the Stanford EE 272B course are having issues with met5 stripes being redrawn in the openlane `make user project wrapper` flow which causes DRVs in precheck We use innovus to harden our design macro which uses met5 as a layer See 1st screenshot below which shows met5 so far so good When then placing that macro in `user project wrapper` the met5 stripes are redrawn see 2nd screenshot How can we prevent openlane from redrawing the stripes and instead connect our design s preexisting power network to the wrapper s rings

Eldrick Saleh Millares · Answer

we ve tried adding a met5 blockage to the macro in a custom `pdn tcl` but we then run into the issue that the macro power stripes are not connected to the outer wrapper ring

Nguyen Dao · Answer

have you tried with `GLB RT OBS` setting

Eldrick Saleh Millares · Answer

< Nguyen Dao> that could work for the met5 re drawing issue but we re also seeing issues with our power network not being connected to the outer rings but this might be due to the global `met5` blockage we added to the macro Have you used this before for macros that have a `met5` layer

Nguyen Dao · Answer

Probably yes we don t use `met5` in our macros but has `met4`and only horizontal `met5` can get through