def _subtract_keepout_from_hole_grid(
self, gather_holes_cell: gdspy.library.Cell) -> gdspy.library.Cell:
"""Given a cell with all the holes, subtract the keepout region.
Then return a new cell with the result.
Args:
gather_holes_cell (gdspy.library.Cell): Holds a grid of all
the holes for cheesing.
Returns:
gdspy.library.Cell: Newly created cell that holds the difference
of holes minus the keep=out region.
"""
# subtact the keepout, note, Based on user options,
# the keepout (no_cheese) cell may not be in self.lib.
temp_keepout_chip_layer_cell = f'temp_keepout_{self.chip_name}_{self.layer}'
temp_keepout_cell = self.lib.new_cell(temp_keepout_chip_layer_cell,
overwrite_duplicate=True)
temp_keepout_cell.add(self.nocheese_gds)
diff_holes = gdspy.boolean(gather_holes_cell.get_polygonsets(),
temp_keepout_cell.get_polygonsets(),
'not',
max_points=self.max_points,
precision=self.precision,
layer=self.layer,
datatype=self.datatype_cheese + 1)
diff_holes_cell_name = f'TOP_{self.chip_name}_{self.layer}_Cheese_diff'
diff_holes_cell = self.lib.new_cell(diff_holes_cell_name,
overwrite_duplicate=True)
diff_holes_cell.add(diff_holes)
self.lib.remove(temp_keepout_chip_layer_cell)
return diff_holes_cell
def _move_to_under_top_chip_layer_name(self, a_cell: gdspy.library.Cell):
"""Move the cell to under TOP_<chip name>_<layer number>.
Args:
a_cell (gdspy.library.Cell): A GDSPY cell.
"""
chip_only_top_chip_layer_name = f'TOP_{self.chip_name}_{self.layer}'
if chip_only_top_chip_layer_name in self.lib.cells:
if a_cell.get_bounding_box() is not None:
self.lib.cells[chip_only_top_chip_layer_name].add(
gdspy.CellReference(a_cell))
else:
self.lib.remove(a_cell)
def _subtract_from_ground_and_move_under_top_chip_layer(
self, diff_holes_cell: gdspy.library.Cell):
"""Get the existing chip_only_top_name cell, then add the holes to it.
Also, add ground_cheesed_cell under chip_only_top_name
Args:
diff_holes_cell (gdspy.library.Cell): New cell with cheesed ground
"""
#chip_only_top_name = f'TOP_{self.chip_name}'
chip_only_top_layer_name = f'TOP_{self.chip_name}_{self.layer}'
#if chip_only_top_name in self.lib.cells:
if chip_only_top_layer_name in self.lib.cells:
if diff_holes_cell.get_bounding_box() is not None:
self.lib.cells[chip_only_top_layer_name].add(
gdspy.CellReference(diff_holes_cell))
ground_cheese_cell = self._subtract_holes_from_ground(
diff_holes_cell)
#Move to under Top_main_layer (Top_chipname_#)
self._move_to_under_top_chip_layer_name(ground_cheese_cell)
else:
self.lib.remove(diff_holes_cell)