Added some complexity to the NPC implant layer generation to avoid
a somewhat common case of bridging shapes being placed too near to
non-poly LICON contacts.
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index de86ffd..3b458a8 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -289,9 +289,11 @@
#endif (METAL5)
#ifdef REDISTRIBUTION
- metal5 mrdlcontact,mrdlc
- metali metalrdl,mrdl,metrdl
+ metal5 mrdlcontact,mrdlc,pi1
+ metali metalrdl,mrdl,metrdl,rdl
-metali obsmrdl
+ metali pi2
+ block ubm
#endif (REDISTRIBUTION)
# Miscellaneous
@@ -358,6 +360,7 @@
#ifdef REDISTRIBUTION
mrdlc metal5 mrdl
+ pi2 mrdl ubm
#endif (REDISTRIBUTION)
end
@@ -582,6 +585,8 @@
mrdlc metal6 metal7 via6
metalrdl metal7
obsmrdl metal7
+ ubm metal8
+ pi2 metal7 metal8 via7
#endif (REDISTRIBUTION)
glass overglass
@@ -1055,10 +1060,16 @@
# surrounds CONT (LICON) on poly only (i.e., pc)
#----------------------------------------------------------------
+ # Avoids a common case of NPC bridges too close to other LICON shapes.
+ templayer diffcutarea pdc,ndc,psc,nsc,mvpdc,mvndc,mvpsc,mvnsc
+ grow 90
+
layer NPC pc
squares-grid 0 170 170
grow 100
bridge 270 270
+ and-not diffcutarea
+ bridge 270 270
grow 130
shrink 130
mask-hints NPC
