# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
#
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from kqcircuits.pya_resolver import pya
from kqcircuits.util.parameters import Param, pdt, add_parameters_from
from kqcircuits.test_structures.test_structure import TestStructure
from kqcircuits.elements.tsvs.tsv import Tsv
from kqcircuits.elements.tsvs.tsv_ellipse import TsvEllipse
[docs]
@add_parameters_from(TsvEllipse, "*", tsv_diameter=10)
class TsvTestPattern(TestStructure):
"""PCell declaration for TSV test structures which resembles a TSV fencing for a CPW transmission line.
Contains a given number of TSVs in `through silicon via`-layer with given vertical, horizontal pitch,
placeholder for CPW, diameter and the lateral profile of the TSV.
"""
cpw_distance = Param(pdt.TypeDouble, "CPW Placeholder distance", 100, unit="μm")
hor_distance = Param(pdt.TypeDouble, "Horizontal pitch on TSV", 200, unit="μm")
ver_distance = Param(pdt.TypeDouble, "Vertical pitch on TSV", 500, unit="μm")
tsv_array_form = Param(pdt.TypeList, "TSV test layout", [2, 6, 6, 2, 6, 6, 2])
[docs]
def build(self):
tsv_unit = self.add_element(Tsv)
for i, ind in enumerate(self.tsv_array_form):
index_at_cpw_pos = int(ind) / 2
for j in range(int(ind)):
if j >= index_at_cpw_pos:
y_pos = (j - (index_at_cpw_pos - 1 / 2)) * self.hor_distance + self.cpw_distance / 2 + 100
else:
y_pos = (j - (index_at_cpw_pos - 1 / 2)) * self.hor_distance - self.cpw_distance / 2 - 100
x_pos = (i - (len(self.tsv_array_form) - 1) / 2) * self.ver_distance
trans = pya.DTrans(x_pos, y_pos)
self.insert_cell(tsv_unit, trans)