Corrected the Magic device generator to paint nwell under pFETs
when the guard ring is not selected (previously it was drawn with
the guard ring so went missing when the guard ring was unselected).
Corrected MiM cap DRC rules (to match the Calibre decks rather than
the documentation, which has different layers for MiM cap). Note
that Magic was modified to correct a wrong reported distance on
CIF-DRC rules such as the one used for one of the MiM cap rules.
diff --git a/sky130/magic/sky130.tcl b/sky130/magic/sky130.tcl
index a64099f..88f9f23 100644
--- a/sky130/magic/sky130.tcl
+++ b/sky130/magic/sky130.tcl
@@ -4943,6 +4943,7 @@
poly_type poly \
poly_contact_type pc \
sub_type nwell \
+ dev_sub_type nwell \
gate_to_polycont 0.32 \
min_effl 0.185 \
min_allc 0.26 \
@@ -4961,6 +4962,7 @@
poly_type poly \
poly_contact_type pc \
sub_type nwell \
+ dev_sub_type nwell \
gate_to_polycont 0.32 \
min_effl 0.185 \
min_allc 0.26 \
@@ -4979,6 +4981,7 @@
poly_type poly \
poly_contact_type pc \
sub_type nwell \
+ dev_sub_type nwell \
gate_to_polycont 0.32 \
min_effl 0.185 \
min_allc 0.26 \
@@ -5001,6 +5004,7 @@
poly_type poly \
poly_contact_type pc \
sub_type nwell \
+ dev_sub_type nwell \
guard_sub_surround 0.33 \
gate_to_polycont 0.32 \
diff_spacing 0.31 \
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 49d7f3a..9f584f8 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -5397,21 +5397,22 @@
# MiM CAP (CAPM) -
#-----------------------------------------------------------
- width *mimcap 2000 "MiM cap width < %d (capm.1)"
+ width *mimcap 1000 "MiM cap width < %d (capm.1)"
spacing *mimcap *mimcap 840 touching_ok "MiM cap spacing < %d (capm.2a)"
- spacing *mimcap via2/m3 1270 touching_illegal \
- "MiM cap spacing to via2 < %d (capm.5)"
+ spacing *mimcap via3/m3 140 touching_illegal \
+ "MiM cap spacing to via3 < %d (capm.5)"
surround *mimcc *mimcap 200 absence_illegal \
"MiM cap must surround MiM cap contact by %d (capm.4)"
rect_only *mimcap "MiM cap must be rectangular (capm.7)
surround *mimcap *metal3/m3 140 absence_illegal \
"Metal3 must surround MiM cap by %d (capm.3)"
- spacing via2 *mimcap 50 touching_illegal "MiM cap cannot overlap via2 (capm.8)"
- spacing via3 *mimcap 50 touching_illegal "MiM cap cannot overlap via3 (capm.8)"
- # (resolve scaling issue!)
- # cifspacing mim_bottom mim_bottom 1200 touching_ok \
- # "MiM cap bottom plate spacing < %d (capm.2b)"
+ spacing via2 *mimcap 140 touching_illegal "MiM cap spacing to via2 < %d (capm.8)"
+ spacing via3 *mimcap 140 touching_illegal "MiM cap spacing to via3 < %d (capm.8)"
+ spacing *mimcap *metal3/m3 500 surround_ok \
+ "MiM cap spacing to unrelated metal3 < %d (capm.11)"
+ cifspacing mim_bottom mim_bottom 120 touching_ok \
+ "MiM cap bottom plate spacing < %d (capm.2b)"
# MiM cap contact rules (VIA3)
@@ -5421,21 +5422,22 @@
"Metal4 overlap of MiM cap contact in one direction < %d (met4.3 - via3.4)"
exact_overlap mimcc/c1
- width *mimcap2 2000 "MiM cap width < %d (cap2m.1)"
+ width *mimcap2 1000 "MiM cap width < %d (cap2m.1)"
spacing *mimcap2 *mimcap2 840 touching_ok "MiM cap spacing < %d (cap2m.2a)"
- spacing *mimcap2 via3/m4 1270 touching_illegal \
- "MiM cap spacing to via3 < %d (cap2m.5)"
+ spacing *mimcap via4/m4 140 touching_illegal \
+ "MiM cap spacing to via4 < %d (cap2m.5)"
surround *mim2cc *mimcap2 200 absence_illegal \
"MiM cap must surround MiM cap contact by %d (cap2m.4)"
rect_only *mimcap2 "MiM cap must be rectangular (cap2m.7)
surround *mimcap2 *metal4/m4 140 absence_illegal \
"Metal4 must surround MiM cap by %d (cap2m.3)"
- spacing via3 *mimcap2 50 touching_illegal "MiM cap cannot overlap via3 (cap2m.8)"
- spacing via4 *mimcap2 50 touching_illegal "MiM cap cannot overlap via4 (cap2m.8)"
- # (resolve scaling issue!)
- # cifspacing mim2_bottom mim2_bottom 1200 touching_ok \
- # "MiM2 cap bottom plate spacing < %d (cap2m.2b)"
+ spacing via3 *mimcap2 140 touching_illegal "MiM cap spacing to via3 < %d (cap2m.8)"
+ spacing via4 *mimcap2 140 touching_illegal "MiM cap spacing to via4 < %d (cap2m.8)"
+ spacing *mimcap *metal4/m4 500 surround_ok \
+ "MiM cap spacing to unrelated metal4 < %d (cap2m.11)"
+ cifspacing mim2_bottom mim2_bottom 120 touching_ok \
+ "MiM2 cap bottom plate spacing < %d (cap2m.2b)"
# MiM cap contact rules (VIA4)
