Corrected a directional surround rule on vias to include metal
resistor, without which it can create weirdly intermittant errors
if a metal resistor abuts a via.
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 630b42e..8a4d9f3 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -4471,9 +4471,9 @@
width v1/m1 260 "Via1 width < %d (via.1a + 2 * via.4a)"
spacing v1 v1 60 touching_ok "Via1 spacing < %d (via.2 - 2 * via.4a)"
- surround v1/m1 *m1 30 directional \
+ surround v1/m1 *m1,rm1 30 directional \
"Metal1 overlap of Via1 < %d in one direction (via.5a - via.4a)"
- surround v1/m2 *m2 30 directional \
+ surround v1/m2 *m2,rm2 30 directional \
"Metal2 overlap of Via1 < %d in one direction (met2.5 - met2.4)"
exact_overlap v1/m1
@@ -4506,13 +4506,13 @@
# VIA2
#--------------------------------------------------
- width v2/m2 280 "via2.width < %d (via2.1a + 2 * via2.4)"
+ width v2/m2 280 "via2 width < %d (via2.1a + 2 * via2.4)"
- spacing v2 v2 120 touching_ok "via2.spacing < %d (via2.2 - 2 * via2.4)"
+ spacing v2 v2 120 touching_ok "via2 spacing < %d (via2.2 - 2 * via2.4)"
- surround v2/m2 *m2 45 directional \
- "Metal2 overlap of via2.< %d in one direction (via2.4a - via2.4)"
- surround v2/m3 *m3 25 absence_illegal "Metal3 overlap of via2.< %d (met3.4)"
+ surround v2/m2 *m2,rm2 45 directional \
+ "Metal2 overlap of via2 < %d in one direction (via2.4a - via2.4)"
+ surround v2/m3 *m3,rm3 25 absence_illegal "Metal3 overlap of via2 < %d (met3.4)"
exact_overlap v2/m2
@@ -4543,12 +4543,12 @@
# VIA3 - Requires METAL5 Module
#--------------------------------------------------
- width v3/m3 320 "via3.width < %d (via3.1 + 2 * via3.4)"
- 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 absence_illegal \
- "Metal4 overlap of via3.< %d (met4.3 - via3.4)"
+ width v3/m3 320 "via3 width < %d (via3.1 + 2 * via3.4)"
+ spacing v3 v3 80 touching_ok "via3 spacing < %d (via3.2 - 2 * via3.4)"
+ surround v3/m3 *m3,rm3 30 directional \
+ "Metal3 overlap of via3 in one direction < %d (via3.5 - via3.4)"
+ surround v3/m4 *m4,rm4 5 absence_illegal \
+ "Metal4 overlap of via3 < %d (met4.3 - via3.4)"
exact_overlap v3/m3
@@ -4578,10 +4578,10 @@
# VIA4 - Requires METAL5 Module
#--------------------------------------------------
- width v4/m4 1180 "via4.width < %d (via4.1 + 2 * via4.4)"
- spacing v4 v4 420 touching_ok "via4.spacing < %d (via4.2 - 2 * via4.4)"
- surround v4/m5 *m5 120 absence_illegal \
- "Metal5 overlap of via4.< %d (met5.3 - via4.4)"
+ width v4/m4 1180 "via4 width < %d (via4.1 + 2 * via4.4)"
+ spacing v4 v4 420 touching_ok "via4 spacing < %d (via4.2 - 2 * via4.4)"
+ surround v4/m5 *m5,rm5 120 absence_illegal \
+ "Metal5 overlap of via4 < %d (met5.3 - via4.4)"
exact_overlap v4/m4
