Source code for kqcircuits.elements.flip_chip_connectors.flip_chip_connector

# 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
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from kqcircuits.elements.element import Element
from kqcircuits.util.geometry_helper import circle_polygon
from kqcircuits.util.parameters import Param, pdt
from kqcircuits.defaults import default_bump_parameters

[docs]class FlipChipConnector(Element): """Connector between matching faces of two chips. The connector makes a galvanic contact between the flipped over top chip and the bottom chip. Origin is at the geometric center. """ ubm_diameter = Param( pdt.TypeDouble, "Under-bump metalization diameter", default_bump_parameters["under_bump_diameter"], unit="μm" ) bump_diameter = Param(pdt.TypeDouble, "Bump diameter", default_bump_parameters["bump_diameter"], unit="μm")
[docs] def create_bump_connector(self): ubm_shape = circle_polygon(self.ubm_diameter / 2, self.n) self.cell.shapes(self.get_layer("underbump_metallization", 0)).insert(ubm_shape) self.cell.shapes(self.get_layer("underbump_metallization", 1)).insert(ubm_shape) avoidance_shape = circle_polygon(self.ubm_diameter / 2 + self.margin, self.n) self.cell.shapes(self.get_layer("ground_grid_avoidance", 0)).insert(avoidance_shape) self.cell.shapes(self.get_layer("ground_grid_avoidance", 1)).insert(avoidance_shape) bump_shape = circle_polygon(self.bump_diameter / 2, self.n) self.cell.shapes(self.get_layer("indium_bump", 0)).insert(bump_shape) # bottom In bump self.cell.shapes(self.get_layer("indium_bump", 1)).insert(bump_shape) # top In bump