A Quick Way to Clear Layout DRC Offgrid Warnings in Calibre and Assura of Cadence Virtuoso

Posted on by Yandan Wang

A quick way to clear DRC offgrid warnings in Calibre and Assura of Cadence virtuoso:

Step 1: If the grid value of Calibre or Assura rule is 0.01, just like IBM 130nm cmrf8sf, however, we may wrongly set it to some other value, for example 0.001.
Offgrid warning in Assura and Calibre of Cadence Virtuosu

Then there will come offgrid warnings. The first figure is under Assura and the second is under Calibre.

Step 2: Find the place where there is offgrid warning.

Step 3: Change the coordinate to the right one.

Step 4: Finally we clear the offgrid warnings. The first figure is under Assura and the second is under Calibre.