Because some (careless, or bad) layouter (or a data transmission error) could have introduced an Nwell figure straddling the Nburied polygon (L48775),
or an Nwell polygon without any Nburied around (L92003). The enclosure rule (L91383) just monitors sufficient overlap.
Because some (careless, or bad) layouter (or a data transmission error) could have introduced an Nwell figure straddling the Nburied polygon (L48775),
or an Nwell polygon without any Nburied around (L92003). The enclosure rule (L91383) just monitors sufficient overlap.
L99790=geomAnd(L90545 Nburied)
L2314=geomStraddle(L86534 L99790)
L74105=geomAndNot(L2314 L99790)
errorLayer(L74105
"NBL.SE.3: Minimum Nwell ring (on Nburied) to P+ Active spacing >= 0.09 um")
L47721=drc(L99790 L86534 enc<0.09)
errorLayer(L47721
"NBL.SE.3: Minimum Nwell ring (on Nburied) to P+ Active spacing >= 0.09 um")
Please Explain line by line(what happens in each command) how he is arriving at L47721 ?