XOR Check
This check is typically run after a metal spin, where the original and modified database are compared. This is done to confirm that the desired modifications have been made and no undesired modifications have been made by accident. This step involves comparing the two layout databases/GDS by XOR operation of the layout geometries. This check results a database which has all the mismatching geometries in both the layouts.
Read more about this topic: Physical Verification
Famous quotes containing the word check:
“Unless you become more watchful in your states and check the spirit of monopoly and thirst for exclusive privileges you will in the end find that ... the control over your dearest interests has passed into the hands of these corporations.”
—Andrew Jackson (1767–1845)