Corrected the surround rule for metal4 around via3 in the DRC and
wiring sections. It had been implemented as 0.060 / 0.065 (directional)
instead of 0.065 (regardless of direction).
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 9e02f37..4da410e 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -3239,8 +3239,8 @@
spacing v3 v3 80 touching_ok "Via3 spacing < %d (Via3 2 - 2 * Via3 4)"
surround v3/m3 *m3 30 directional \
"Metal3 overlap of Via3 in one direction < %d (Via3 5 - Via3 4)"
- surround v3/m4 *m4 5 directional \
- "Metal4 overlap of Via3 in one direction < %d (Met4 3 - Via3 4)"
+ surround v3/m4 *m4 5 absence_illegal \
+ "Metal4 overlap of Via3 < %d (Met4 3 - Via3 4)"
exact_overlap v3/m3
@@ -3993,7 +3993,7 @@
contact v1 260 m1 0 30 m2 0 30
contact v2 280 m2 0 45 m3 25 0
#ifdef METAL5
- contact v3 320 m3 0 30 m4 0 5
+ contact v3 320 m3 0 30 m4 5 5
contact v4 1180 m4 0 m5 120
#endif (METAL5)
