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Fix pwell contact in column mux to have layers for Magic.

This commit is contained in:
Matt Guthaus 2018-01-29 15:53:22 -08:00
parent 6080b59058
commit 313e06d2af
1 changed files with 3 additions and 22 deletions
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25
compiler/single_level_column_mux.py
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@ -152,7 +152,6 @@ class single_level_column_mux(design.design):
def add_wells(self): def add_wells(self):
""" Add a well and implant over the whole cell. Also, add the pwell contact (if it exists) """ """ Add a well and implant over the whole cell. Also, add the pwell contact (if it exists) """
# find right most gnd rail # find right most gnd rail
gnd_pins = self.bitcell.get_pins("gnd") gnd_pins = self.bitcell.get_pins("gnd")
@ -167,26 +166,8 @@ class single_level_column_mux(design.design):
offset=m1m2_offset) offset=m1m2_offset)
active_offset = right_gnd.bc() + vector(0,0.5*self.nmos.poly_height) active_offset = right_gnd.bc() + vector(0,0.5*self.nmos.poly_height)
self.add_via_center(layers=("active", "contact", "metal1"), self.add_via_center(layers=("active", "contact", "metal1"),
offset=active_offset) offset=active_offset,
implant_type="p",
well_type="p")
# implant must surround the active area
active_correct = vector(contact.well.width,contact.well.height).scale(0.5,0.5)
offset_implant = active_offset - vector([drc["implant_to_contact"]]*2) - active_correct
implant_width = 2*drc["implant_to_contact"] + contact.well.width
implant_height = 2*drc["implant_to_contact"] + contact.well.height
self.add_rect(layer="pimplant",
offset=offset_implant,
width=implant_width,
height=implant_height)
# Add a well around the whole cell
if info["has_pwell"]:
self.add_rect(layer="pwell",
offset=vector(0,0),
width=self.width + contact.well.width + drc["well_enclosure_active"],
height=self.height)
self.add_rect(layer="vtg",
offset=vector(0,0),
width=self.width + contact.well.width,
height=self.height)