Added 81:20 (pad center ID) to the list of ignored layer:purpose
pairs in the magic tech file.
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 121c5ca..8ec8675 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -2394,6 +2394,7 @@
ignore HVNWELLID
ignore PADDIFFID
ignore PADMETALID
+ ignore PADCENTERID
layer pnp NWELL,WELLTXT,WELLPIN
and PNPID
@@ -4031,6 +4032,7 @@
calma MET5BLOCK 72 10
calma PADDIFFID 81 6
calma PADMETALID 81 8
+ calma PADCENTERID 81 20
# LICON
calma CONT 66 44