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use add_enclosure to extend implants

This commit is contained in:
mrg 2020-06-24 11:54:59 -07:00
parent 4bc3df8931
commit e694622f28
1 changed files with 35 additions and 24 deletions
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59
compiler/pgates/pgate.py
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@ -135,8 +135,6 @@ class pgate(design.design):
offset=contact_offset,
directions=directions)
self.input_pin_vias.append(via)
self.add_layout_pin_rect_center(text=name,
layer=self.route_layer,
offset=contact_offset,
@ -151,27 +149,7 @@ class pgate(design.design):
height=contact.poly_contact.first_layer_width,
width=left_gate_offset.x - contact_offset.x)
def enclose_npc(self):
""" Enclose the poly contacts with npc layer """
ll = None
ur = None
for via in self.input_pin_vias:
# Find ll/ur
if not ll:
ll = via.ll()
else:
ll = ll.min(via.ll())
if not ur:
ur = via.ur()
else:
ur = ur.max(via.ur())
npc_enclose_poly = drc("npc_enclose_poly")
npc_enclose_offset = vector(npc_enclose_poly, npc_enclose_poly)
self.add_rect(layer="npc",
offset=ll - npc_enclose_offset,
width=(ur.x - ll.x) + 2 * npc_enclose_poly,
height=(ur.y - ll.y) + 2 * npc_enclose_poly)
return via
def extend_wells(self):
""" Extend the n/p wells to cover whole cell """
@ -179,6 +157,7 @@ class pgate(design.design):
# This should match the cells in the cell library
self.nwell_yoffset = 0.48 * self.height
full_height = self.height + 0.5 * self.m1_width
# FIXME: float rounding problem
if "nwell" in layer:
@ -212,6 +191,8 @@ class pgate(design.design):
offset=pwell_position,
width=self.width + 2 * self.well_extend_active,
height=pwell_height)
self.extend_implants()
def add_nwell_contact(self, pmos, pmos_pos):
""" Add an nwell contact next to the given pmos device. """
@ -267,6 +248,36 @@ class pgate(design.design):
# Return the top of the well
def extend_implants(self):
"""
Add top-to-bottom implants for adjacency issues in s8.
"""
nmos_insts = self.get_tx_insts("nmos")
pmos_insts = self.get_tx_insts("pmos")
ntap_insts = [self.nwell_contact]
ptap_insts = [self.pwell_contact]
self.add_enclosure(nmos_insts,
layer="nimplant",
extend=self.implant_enclose_active,
leftx=0,
boty=0)
self.add_enclosure(pmos_insts,
layer="pimplant",
extend=self.implant_enclose_active,
leftx=0,
topy=self.height)
self.add_enclosure(ntap_insts,
layer="nimplant",
extend=self.implant_enclose_active,
rightx=self.width,
topy=self.height)
self.add_enclosure(ptap_insts,
layer="pimplant",
extend=self.implant_enclose_active,
rightx=self.width,
boty=0)
def add_pwell_contact(self, nmos, nmos_pos):
""" Add an pwell contact next to the given nmos device. """
@ -295,7 +306,7 @@ class pgate(design.design):
offset=contact_offset.scale(1, 0.5),
width=self.pwell_contact.mod.second_layer_width,
height=contact_offset.y)
# Now add the full active and implant for the NMOS
# active_offset = nmos_pos + vector(nmos.active_width,0)
# This might be needed if the spacing between the actives