Finished pass through the DRC rule templates and fixed all of them
that I could determine how to fix, leaving only a handful of errors
not handled correctly.
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 5be057a..69faf54 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -367,6 +367,8 @@
allnfets nfet,npass,npd,scnfet,mvnfet,mvnnfet,nfetlvt,nsonos
allpfets pfet,ppu,scpfet,mvpfet,pfethvt,pfetlvt,pfetmvt
allfets allnfets,allpfets,varactor,mvvaractor,varhvt
+ allfetsstd nfet,mvnfet,mvnnfet,nfetlvt,pfet,mvpfet,pfethvt,pfetlvt,pfetmvt
+ allfetsspecial npass,npd,scnfet,nsonos,ppu,scpfet
allnactivenonfet *ndiff,*nsd,*ndiode,*nndiode,*mvndiff,*mvnsd,*mvndiode,*ndiodelvt
allnactive allnactivenonfet,allnfets
@@ -1313,6 +1315,19 @@
templayer dnwell_missing nsonos
and-not dnwell
+ # SONOS nFET devices must be in cell with abutment box
+ templayer abutment_box
+ boundary
+
+ templayer bbox_missing nsonos
+ and-not abutment_box
+
+ # Make sure nwell covers varactor poly
+ templayer var_poly_no_nwell
+ bloat-all *poly varactor,mvvaractor
+ grow 150
+ and-not nwell
+
# Define MiM cap bottom plate for spacing rule
templayer mim_bottom
bloat-all *mimcap *metal3
@@ -1472,6 +1487,17 @@
and-not dnwell
and allpdifflv,allpdiffmv
+ templayer nwell_with_tap
+ bloat-all nsc,mvnsc nwell
+
+ templayer nwell_missing_tap nwell
+ and-not nwell_with_tap
+
+ # Make sure varactor nwell contains no P diffusion
+ templayer pdiff_in_varactor_well
+ bloat-all varactor,mvvaractor nwell
+ and allpactive
+
templayer m1_small_hole allm1,obsm1,obslic
close 140000
@@ -1484,6 +1510,42 @@
templayer m2_hole_empty m2_small_hole
and-not allm2,obsm2
+ templayer m1_huge allm1
+ shrink 1500
+ grow 1500
+
+ templayer m1_large_halo m1_huge
+ grow 280
+ and-not m1_huge
+ and allm1
+
+ templayer m2_huge allm2
+ shrink 1500
+ grow 1500
+
+ templayer m2_large_halo m2_huge
+ grow 280
+ and-not m2_huge
+ and allm2
+
+ templayer m3_huge allm3
+ shrink 1500
+ grow 1500
+
+ templayer m3_large_halo m3_huge
+ grow 400
+ and-not m3_huge
+ and allm3
+
+ templayer m4_huge allm4
+ shrink 1500
+ grow 1500
+
+ templayer m4_large_halo m4_huge
+ grow 400
+ and-not m4_huge
+ and allm4
+
#ifdef EXPERIMENTAL
#----------------------------------------------------------------
style paint
@@ -4917,12 +4979,16 @@
spacing dnwell dnwell 6300 touching_ok "Deep N-well spacing < %d (dnwell.3)"
spacing dnwell allnwell 4500 surround_ok \
"Deep N-well spacing to N-well < %d (nwell.7)"
+
+ variants (full)
cifmaxwidth nwell_missing 0 bend_illegal \
"N-well overlap of Deep N-well < 0.4um outside, 1.03um inside (nwell.5a, 7)"
cifmaxwidth dnwell_missing 0 bend_illegal \
"SONOS nFET must be in Deep N-well (tunm.6a)"
+
cifmaxwidth pdiff_crosses_dnwell 0 bend_illegal \
"P+ diff cannot straddle Deep N-well (dnwell.5)"
+ variants (fast),(full)
#-----------------------------
# NWELL
@@ -4931,6 +4997,11 @@
width allnwell 840 "N-well width < %d (nwell.1)"
spacing allnwell allnwell 1270 touching_ok "N-well spacing < %d (nwell.2a)"
+ variants (full)
+ cifmaxwidth nwell_missing_tap 0 bend_illegal \
+ "All nwells must contain metal-connected N+ taps (nwell.4)"
+ variants (fast),(full)
+
#-----------------------------
# DIFF
#-----------------------------
@@ -4939,6 +5010,7 @@
150 "Diffusion width < %d (diff/tap.1)"
width *mvndiff,mvnfet,mvnnfet,*mvndiode,*nndiode,mvndiffres,*mvpdiff,mvpfet,*mvpdiode 290 \
"MV Diffusion width < %d (diff/tap.14)"
+
width *mvnsd,*mvpsd 150 "MV Tap width < %d (diff/tap.1)"
extend *mvpsd *mvndiff 700 "MV Butting tap length < %d (diff/tap.16)"
extend *mvnsd *mvpdiff 700 "MV Butting tap length < %d (diff/tap.16)"
@@ -4983,22 +5055,26 @@
# Butting junction rules
edge4way (*psd)/a ~(*ndiff,*psd)/a 125 ~(*ndiff)/a (*ndiff)/a 125 \
- "N-Diffusion to P-tap spacing < %d across butted junction"
+ "N-Diffusion to P-tap spacing < %d across butted junction (psd.5b)"
edge4way (*ndiff)/a ~(*ndiff,*psd)/a 125 ~(*psd)/a (*psd)/a 125 \
- "N-Diffusion to P-tap spacing < %d across butted junction"
+ "N-Diffusion to P-tap spacing < %d across butted junction (psd.5a)"
edge4way (*nsd)/a ~(*pdiff,*nsd)/a 125 ~(*pdiff)/a (*pdiff)/a 125 \
- "P-Diffusion to N-tap spacing < %d across butted junction"
+ "P-Diffusion to N-tap spacing < %d across butted junction (nsd.5b)"
edge4way (*pdiff)/a ~(*pdiff,*nsd)/a 125 ~(*nsd)/a (*nsd)/a 125 \
- "P-Diffusion to N-tap spacing < %d across butted junction"
+ "P-Diffusion to N-tap spacing < %d across butted junction (nsd.5a)"
edge4way (*mvpsd)/a ~(*mvndiff,*mvpsd)/a 125 ~(*mvndiff)/a (*mvndiff)/a 125 \
- "MV N-Diffusion to MV P-tap spacing < %d across butted junction"
+ "MV N-Diffusion to MV P-tap spacing < %d across butted junction (psd.5b)"
edge4way (*mvndiff)/a ~(*mvndiff,*mvpsd)/a 125 ~(*mvpsd)/a (*mvpsd)/a 125 \
- "MV N-Diffusion to MV P-tap spacing < %d across butted junction"
+ "MV N-Diffusion to MV P-tap spacing < %d across butted junction (psd.5a)"
edge4way (*mvnsd)/a ~(*mvpdiff,*mvnsd)/a 125 ~(*mvpdiff)/a (*mvpdiff)/a 125 \
- "MV P-Diffusion to MV N-tap spacing < %d across butted junction"
+ "MV P-Diffusion to MV N-tap spacing < %d across butted junction (nsd.5b)"
edge4way (*mvpdiff)/a ~(*mvpdiff,*mvnsd)/a 125 ~(*mvnsd)/a (*mvnsd)/a 125 \
- "MV P-Diffusion to MV N-tap spacing < %d across butted junction"
+ "MV P-Diffusion to MV N-tap spacing < %d across butted junction (nsd.5a)"
+
+ # Sandwiched butting junction restrictions
+ edge4way (*pdiff)/a (*nsd)/a 400 ~(*pdiff)/a 0 0 "NSDM width < %d (diff/tap.5)
+ edge4way (*ndiff)/a (*psd)/a 400 ~(*ndiff)/a 0 0 "PSDM width < %d (diff/tap.5)
variants (full)
@@ -5010,7 +5086,7 @@
cifmaxwidth ntap_missing 0 bend_illegal \
"P-diff distance to N-tap must be < 15.0um (LU.3)"
- variants *
+ variants (fast),(full)
#-----------------------------
# POLY
@@ -5018,8 +5094,11 @@
width allpoly 150 "poly width < %d (poly.1a)"
spacing allpoly allpoly 210 touching_ok "poly spacing < %d (poly.2)"
- spacing allpolynonfet alldifflvnonfet 75 corner_ok allfets \
- "poly spacing to Diffusion < %d (poly.4a)"
+
+ spacing allpolynonfet \
+ *ndif,*ndiode,*nndiode,ndiffres,*ndiodelvt,*pdif,*pdiode,pdiffres,*pdiodelvt,*pdiodehvt \
+ 75 corner_ok allfets \
+ "poly spacing to Diffusion < %d (poly.4)"
spacing npres *nsd 480 touching_illegal \
"poly resistor spacing to N-tap < %d (poly.9)"
overhang *ndiff,rndiff nfet,scnfet,npd,npass 250 "N-Diffusion overhang of nmos < %d (poly.7)"
@@ -5032,9 +5111,16 @@
rect_only xhrpoly,uhrpoly "No bends in poly resistors (poly.11)"
extend xpc/a xhrpoly,uhrpoly 2160 \
"poly contact extends poly resistor by < %d (licon.1c + li.5)"
- spacing xhrpoly,uhrpoly xhrpoly,uhrpoly 1240 touching_illegal \
+ spacing xhrpoly,uhrpoly,xpc xhrpoly,uhrpoly,xpc 1240 touching_illegal \
"Distance between precision resistors < %d (rpm.2 + 2 * rpm.3)"
+ spacing xhrpoly,uhrpoly,xpc allndifflv,allndiffmv 780 touching_illegal \
+ "Distance from precision resistor to N+ diffusion < %d (rpm.3 + rpm.6 + nsd.5a)"
+ spacing xhrpoly,uhrpoly,xpc *poly 400 touching_illegal \
+ "Distance from precision resistor to unrelated poly < %d (rpm.3 + rpm.7)"
+ spacing xhrpoly,uhrpoly,xpc allndiffmvnontap 830 touching_illegal \
+ "Distance from precision resistor to MV N+ diffusion < %d (rpm.3 + rpm.9)"
+
#--------------------------------------------------------------------
# HVTP
#--------------------------------------------------------------------
@@ -5043,6 +5129,9 @@
360 touching_illegal \
"Min. spacing between pFET and HVTP < %d (hvtp.4)"
+ spacing pmoshvt,pdiodehvt,varactorhvt varactor 360 touching_illegal \
+ "Min. spacing between varactor and HVTP < %d (hvtp.4 + varac.3)"
+
#--------------------------------------------------------------------
# LVTN
#--------------------------------------------------------------------
@@ -5192,6 +5281,8 @@
# LI - Local interconnect layer
#-------------------------------------------------------------
+variants *
+
width *li 170 "Local interconnect width < %d (li.1)"
width rli 290 "Local interconnect width < %d (li.7)"
width coreli 140 "Core local interconnect width < %d (li.c1)"
@@ -5231,13 +5322,16 @@
variants (fast),(full)
widespacing allm1 3000 allm1,*obsm1 280 touching_ok \
- "Metal1 > 3um spacing to unrelated m1 < %d (met1.3a)"
+ "Metal1 > 3um spacing to unrelated m1 < %d (met1.3b)"
widespacing *obsm1 3000 allm1 280 touching_ok \
- "Metal1 > 3um spacing to unrelated m1 < %d (met1.3a)"
+ "Metal1 > 3um spacing to unrelated m1 < %d (met1.3b)"
variants (full)
cifmaxwidth m1_hole_empty 0 bend_illegal \
"Min area of metal1 holes > 0.14um^2 (met1.7)"
+
+ cifspacing m1_large_halo m1_large_halo 280 touching_ok \
+ "Spacing of metal1 features attached to and within 0.28um of large metal1 < %d (met1.3a)"
variants *
#--------------------------------------------------
@@ -5263,13 +5357,16 @@
variants (fast),(full)
widespacing allm2 3000 allm2,obsm2 280 touching_ok \
- "Metal2 > 3um spacing to unrelated m2 < %d (met2.3)"
+ "Metal2 > 3um spacing to unrelated m2 < %d (met2.3b)"
widespacing obsm2 3000 allm2 280 touching_ok \
- "Metal2 > 3um spacing to unrelated m2 < %d (met2.3)"
+ "Metal2 > 3um spacing to unrelated m2 < %d (met2.3b)"
variants (full)
cifmaxwidth m2_hole_empty 0 bend_illegal \
"Min area of metal2 holes > 0.14um^2 (met2.7)"
+
+ cifspacing m2_large_halo m2_large_halo 280 touching_ok \
+ "Spacing of metal2 features attached to and within 0.28um of large metal2 < %d (met2.3a)"
variants *
#--------------------------------------------------
@@ -5299,6 +5396,8 @@
"Metal3 > 3um spacing to unrelated m3 < %d (met3.3d)"
widespacing obsm3 3000 allm3 400 touching_ok \
"Metal3 > 3um spacing to unrelated m3 < %d (met3.3d)"
+ cifspacing m3_large_halo m3_large_halo 400 touching_ok \
+ "Spacing of metal3 features attached to and within 0.40um of large metal3 < %d (met3.3c)"
variants *
@@ -5332,6 +5431,8 @@
"Metal4 > 3um spacing to unrelated m4 < %d (met4.5b)"
widespacing obsm4 3000 allm4 400 touching_ok \
"Metal4 > 3um spacing to unrelated m4 < %d (met4.5b)"
+ cifspacing m4_large_halo m4_large_halo 400 touching_ok \
+ "Spacing of metal4 features attached to and within 0.40um of large metal4 < %d (met4.5a)"
variants *
#--------------------------------------------------
@@ -5365,7 +5466,7 @@
surround glass metrdl 10750 absence_ok "RDL must surround glass cut by %d (rdl.3)"
spacing metrdl padl 19660 surround_ok "RDL spacing to unrelated pad < %d (rdl.6)"
-variants *
+variants (fast),(full)
#endif (REDISTRIBUTION)
@@ -5373,14 +5474,18 @@
# NMOS, PMOS
#--------------------------------------------------
- extend allfets *poly 420 "Transistor width < %d (diff/tap.2)"
+ edge4way *poly allfetsstd 420 allfets 0 0 \
+ "Transistor width < %d (diff/tap.2)"
+ edge4way *poly allfetsspecial 360 allfets 0 0 \
+ "Transistor in standard cell width < %d (diff/tap.2)"
+
# Except: Note that standard cells allow transistor width minimum 0.36um
width pfetlvt 350 "LVT PMOS gate length < %d (poly.1b)"
- spacing *nsd,*mvnsd allpolynonfet 55 touching_illegal \
- "N-tap spacing to field poly < %d (poly.5)"
- spacing *psd,*mvpsd allpolynonfet 55 touching_illegal \
- "P-tap spacing to field poly < %d (poly.5)"
+ spacing allpolynonfet *nsd 55 corner_ok varactor \
+ "poly spacing to diffusion tap < %d (poly.5)"
+ spacing allpolynonfet *mvnsd 55 corner_ok mvvaractor \
+ "poly spacing to diffusion tap < %d (poly.5)"
# Full edge rule required to describe FET to butted tap distance
edge4way *psd *ndiff 300 *ndiff *psd 300 \
@@ -5426,19 +5531,31 @@
#--------------------------------------------------
# xhrpoly (P+ poly resistor)
-#--------------------------------------------------
-
- width xhrpoly 350 "xhrpoly resistor width < %d (P+ poly.1a)"
- # NOTE: xhrpoly resistor requires choice of discrete widths 0.35, 0.69, ... up to 1.27.
-
-#--------------------------------------------------
# uhrpoly (P+ poly resistor, 2kOhm/sq)
#--------------------------------------------------
- width uhrpoly 350 "uhrpoly resistor width < %d"
+ # NOTE: u/xhrpoly resistor requires discrete widths 0.35, 0.69, ... up to 1.27.
+ width xhrpoly 350 "xhrpoly resistor width < %d (P+ poly.1a)"
+ width uhrpoly 350 "uhrpoly resistor width < %d (P+ poly.1a)"
+
spacing xhrpoly,uhrpoly,xpc alldiff 480 touching_illegal \
"xhrpoly/uhrpoly resistor spacing to diffusion < %d (poly.9)"
+ spacing allpolyres,xpc *poly,allfets 480 touching_illegal \
+ "Poly resistor spacing to poly < %d (poly.9)"
+
+ spacing allpolyres,xpc alldiff 480 touching_illegal \
+ "Poly resistor spacing to diffusion < %d (poly.9)"
+
+#------------------------------------
+# nsonos
+#------------------------------------
+
+variants (full)
+ cifmaxwidth bbox_missing 0 bend_illegal \
+ "SONOS transistor must be in cell with abutment box (tunm.8)"
+variants (fast),(full)
+
#------------------------------------
# MOS Varactor device rules
#------------------------------------
@@ -5452,6 +5569,14 @@
width var,varhvt,mvvar 180 "Varactor length < %d (var.1)"
extend var,varhvt,mvvar *poly 1000 "Varactor width < %d (var.2)"
+variants (full)
+ cifmaxwidth var_poly_no_nwell 0 bend_illegal \
+ "N-well overlap of varactor poly < 0.15um (varac.5)"
+
+ cifmaxwidth pdiff_in_varactor_well 0 bend_illegal \
+ "Varactor N-well must not contain P+ diffusion (varac.7)"
+variants (fast),(full)
+
#ifdef MIM
#-----------------------------------------------------------
# MiM CAP (CAPM) -
@@ -5471,8 +5596,11 @@
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)"
+
+variants (full)
cifspacing mim_bottom mim_bottom 1200 touching_ok \
"MiM cap bottom plate spacing < %d (capm.2b)"
+variants (fast),(full)
# MiM cap contact rules (VIA3)
@@ -5496,8 +5624,11 @@
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)"
+
+variants (full)
cifspacing mim2_bottom mim2_bottom 1200 touching_ok \
"MiM2 cap bottom plate spacing < %d (cap2m.2b)"
+variants (fast),(full)
# MiM cap contact rules (VIA4)
