Source code for kqcircuits.elements.tsvs.tsv_ellipse

# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
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import math

import numpy

from kqcircuits.elements.tsvs.tsv import Tsv
from kqcircuits.pya_resolver import pya
from kqcircuits.util.parameters import Param, pdt


[docs]class TsvEllipse(Tsv): """Connector between faces of two sides of a substrate. Origin is at the geometric center. Geometry is elliptical. .. MARKERS_FOR_PNG -0.2,0 """ tsv_elliptical_width = Param(pdt.TypeDouble, "TSV elliptical width", 30, unit="μm")
[docs] def produce_impl(self): self.create_tsv_connector()
[docs] def create_tsv_connector(self): """ Generate elliptical TSV """ # shorthand r = self.tsv_diameter / 2 w = self.tsv_elliptical_width / 2 n = self.n # parametric representation is taken from https://en.wikipedia.org/wiki/Superellipse p1 = 6 p2 = 2 tsv_pts = [ pya.DPoint( numpy.abs(math.cos(a)) ** (2 / p1) * w * numpy.sign(math.cos(a)), numpy.abs(math.sin(a)) ** (2 / p2) * r * numpy.sign(math.sin(a)), ) for a in (x / n * 2 * math.pi for x in range(0, n + 1)) ] tsv_region = pya.Region(pya.DPolygon(tsv_pts).to_itype(self.layout.dbu)) self.cell.shapes(self.get_layer("ground_grid_avoidance")).insert( tsv_region.sized(self.tsv_margin / self.layout.dbu, self.tsv_margin / self.layout.dbu, 2) ) self.cell.shapes(self.get_layer("ground_grid_avoidance", 1)).insert( tsv_region.sized(self.tsv_margin / self.layout.dbu, self.tsv_margin / self.layout.dbu, 2) ) self.cell.shapes(self.get_layer("through_silicon_via")).insert(tsv_region) self.cell.shapes(self.get_layer("through_silicon_via", 1)).insert(tsv_region)