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


[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 m = self.margin # parametric representation is taken from https://en.wikipedia.org/wiki/Superellipse p1 = 6 p2 = 2 # Protection layer tsv_pts_avoidance = [pya.DPoint( numpy.abs(math.cos(a)) ** (2 / p1) * (w + m) * numpy.sign(math.cos(a)), numpy.abs(math.sin(a)) ** (2 / p2) * (r + m) * numpy.sign(math.sin(a))) for a in (x / 32 * math.pi for x in range(0, 65))] 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 / 32 * math.pi for x in range(0, 65))] shape = pya.DPolygon(tsv_pts_avoidance) # ground avoidance layer 1t1 face self.cell.shapes(self.get_layer("ground_grid_avoidance")).insert(shape) self.cell.shapes(self.get_layer("through_silicon_via")).insert(pya.DPolygon(tsv_pts)) # TSV only on 1t1 face