# This code is part of KQCircuits
# Copyright (C) 2022 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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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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# (meetiqm.com/iqm-open-source-trademark-policy). IQM welcomes contributions to the code.
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from kqcircuits.elements.airbridges.airbridge import Airbridge
from kqcircuits.elements.flip_chip_connectors.flip_chip_connector_dc import FlipChipConnectorDc
from kqcircuits.pya_resolver import pya
from kqcircuits.util.parameters import Param, pdt, add_parameters_from
[docs]
@add_parameters_from(FlipChipConnectorDc)
@add_parameters_from(Airbridge, bridge_width=40, pad_length=40)
class AirbridgeMultiFace(Airbridge):
"""PCell declaration for a multi-face equivalent for an airbridge.
Origin is at the geometric center. The airbridge is in vertical direction.
Adds base metal on the second face and optionally creates bumps at both ends.
.. MARKERS_FOR_PNG 6,0 0,3 0,42 15.5,41.984755
"""
default_type = "Airbridge Multi Face"
include_bumps = Param(pdt.TypeBoolean, "Include bumps", True)
[docs]
def build(self):
half_length = self.bridge_length / 2
half_box_length = half_length + self.pad_length
half_width = self.bridge_width / 2
# Add base metal addition to second face
shape = pya.DBox(-half_width, -half_box_length, half_width, half_box_length)
self.cell.shapes(self.get_layer("base_metal_addition", 1)).insert(shape)
# Add ground grid avoidance to second face
self.cell.shapes(self.get_layer("ground_grid_avoidance", 1)).insert(shape.enlarged(self.margin, self.margin))
# Flip-chip bump
if self.include_bumps:
bump_dist = half_length + self.pad_length / 2
bump = self.add_element(FlipChipConnectorDc)
self.insert_cell(bump, pya.DTrans(pya.DPoint(0.0, bump_dist)))
self.insert_cell(bump, pya.DTrans(pya.DPoint(0.0, -bump_dist)))
# refpoints for connecting to waveguides
self.add_port("a", pya.DPoint(0, half_length), pya.DVector(0, 1))
self.add_port("b", pya.DPoint(0, -half_length), pya.DVector(0, -1))