Adding design rules

DF.4c and Mn.1

technologies/gf180.tech.py

@@ -332,7 +332,7 @@ minimum_width = {
     l_metal2: 280*nm, # Mn.1
     l_metal3: 280*nm, # Mn.1
     l_metal4: 280*nm, # Mn.1
-    l_metal5: 280*nm, # Mn.1
+    l_metal5: 440*nm, # Mn.1
     l_nwell: 860*nm, # NW.1a
     l_pwell: 740*nm, # LPW.1
     l_nplus: 400*nm # NP.1
@@ -352,8 +352,8 @@ minimum_enclosure = {
     (l_metal2, l_via1): 60*nm, # Vn.4
 
     # l_*well must overlap l_*diffusion
-    (l_nwell, l_pdiffusion): 180*nm, # (difftap.8) # This causes notches, I am trying to get rid of them
-    (l_pwell, l_ndiffusion): 180*nm, # (difftap.8)
+    (l_nwell, l_pdiffusion): 430*nm, # DF.4c
+    (l_pwell, l_ndiffusion): 430*nm, # DF.4c
     (l_abutment_box, l_nwell): 0, # The nwell and pwell should not go beyond the abutment
     (l_abutment_box, l_pwell): 0,
     (l_nplus, l_ndiff_contact): 230*nm, # NP.5a  Implicitly encodes the size of well taps.