# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
#
# This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
# version.
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# (meetiqm.com/iqm-open-source-trademark-policy). IQM welcomes contributions to the code.
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from kqcircuits.elements.element import Element
from kqcircuits.pya_resolver import pya
from kqcircuits.util.geometry_helper import region_with_merged_polygons
[docs]
def merge_layers(layout, cell_list, layer_1, layer_2, layer_merged):
"""Inserts shapes in layer_1 and layer_2 to layer_merged.
Args:
layout: Layout of the cells
cell_list: list of Cells whose shapes are merged (recursively)
layer_1: LayerInfo of the layer to be merged with layer_2
layer_2: LayerInfo of the layer to be merged with layer_1
layer_merged: LayerInfo of the layer where the merged shapes are inserted
"""
for cell in cell_list:
iter1 = pya.RecursiveShapeIterator(layout, cell, layout.layer(layer_1))
iter2 = pya.RecursiveShapeIterator(layout, cell, layout.layer(layer_2))
reg1 = pya.Region(iter1)
reg2 = pya.Region(iter2)
merge_reg = reg1 + reg2
cell.shapes(layout.layer(layer_merged)).insert(merge_reg)
[docs]
def merge_layout_layers_on_face(layout, cell, face, tolerance=0.004):
"""Creates "base_metal_gap" layer on given face.
The layer shape is combination of three layers using subtract (-) and insert (+) operations:
"base_metal_gap" = "base_metal_gap_wo_grid" - "base_metal_addition" + "ground_grid"
Args:
layout: Layout containing the cell
cell: Cell to merge
face: face dictionary containing layer names as keys and layer info objects as values
tolerance: gap length to be ignored while merging (µm)
"""
gaps = pya.Region(cell.begin_shapes_rec(layout.layer(face["base_metal_gap_wo_grid"])))
metal = pya.Region(cell.begin_shapes_rec(layout.layer(face["base_metal_addition"])))
grid = cell.begin_shapes_rec(layout.layer(face["ground_grid"]))
res = cell.shapes(layout.layer(face["base_metal_gap"]))
res.insert(region_with_merged_polygons(gaps - metal, tolerance / layout.dbu))
res.insert(grid)
[docs]
def convert_child_instances_to_static(
layout: pya.Layout, cell: pya.Cell, only_elements: bool = True, prune: bool = True
):
"""Convert child instances of a cell to static.
This function avoids duplicating cells: in case there are multiple instances pointing to the same PCell, only
one static cell is created and all instances are pointed to that cell. This is in contrast to calling
``Instance.convert_to_static()`` on each instance separately.
Args:
layout: the Layout that contains the cell
cell: static cell that may contain PCell instances to be converted
only_elements: if True (default), only PCells which are descendants of Element are made static
prune: if True, the PCells are deleted if they are no longer used anywhere in the layout.
"""
# Build a dictionary {pcell: list of instances} for all instances that need to be converted
cells_to_convert = {}
for inst in cell.each_inst():
if inst.is_pcell() and (not only_elements or isinstance(inst.pcell_declaration(), Element)):
pcell = layout.cell(inst.cell_index)
cells_to_convert[pcell] = cells_to_convert.get(pcell, []) + [inst]
# Convert the cells and point the instances to the new static cell
for pcell, instances in cells_to_convert.items():
static_cell_index = layout.convert_cell_to_static(pcell.cell_index())
for inst in instances:
inst.cell_index = static_cell_index
# Prune: deletes the old PCells unless they are still used elsewhere.
if prune:
for pcell in cells_to_convert:
layout.prune_cell(pcell.cell_index(), -1)