Source code for kqcircuits.chips.airbridge_dc_test

# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
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from kqcircuits.chips.chip import Chip
from kqcircuits.pya_resolver import pya
from kqcircuits.util.parameters import Param, pdt
from kqcircuits.test_structures.airbridge_dc import AirbridgeDC


[docs] class AirbridgeDcTest(Chip): """Chip full of airbridge 4-point dc tests.""" n_step = Param(pdt.TypeInt, "Increment step for number of airbridges", 1) test_width = Param(pdt.TypeDouble, "Width of a single test", 2000, unit="μm")
[docs] def build(self): d1 = float(self.frames_dice_width[0]) + self.dice_grid_margin # smaller distance of test area from chip edge d2 = 2000 # larger distance of test area from chip edge chip_size = self.box.width() n_ab = self.n_step test_id = 0 n_ab, test_id = self._produce_tests_within_box( pya.DBox(d2, chip_size - d2, chip_size - d2, chip_size - d1), n_ab, test_id ) n_ab, test_id = self._produce_tests_within_box(pya.DBox(d1, d2, chip_size - d1, chip_size - d2), n_ab, test_id) n_ab, test_id = self._produce_tests_within_box(pya.DBox(d2, d1, chip_size - d2, d2), n_ab, test_id)
def _produce_tests_within_box(self, box, n_ab, test_id): num_horizontal = int(box.width() // self.test_width) x_start = box.left + (box.width() - self.test_width * num_horizontal) / 2 # to make them horizontally centered x = x_start y = box.top while y > box.bottom: while x < box.right: cell = self.add_element(AirbridgeDC, n_ab=n_ab, width=self.test_width) test_height = cell.dbbox_per_layer(self.get_layer("base_metal_gap_wo_grid")).height() num_vertical = int(box.height() // test_height) # assuming test_height same for all tests y_offset = (box.height() - test_height * num_vertical) / 2 # to make them vertically centered trans = pya.DTrans(pya.DVector(x + self.test_width / 2, y - y_offset - test_height / 2)) x += self.test_width if x > box.right or y - test_height < box.bottom: break label_trans = pya.DCplxTrans(0.8, 0, False, -self.test_width / 2, 0) self.insert_cell(cell, trans, "test_{}".format(test_id), label_trans) n_ab += self.n_step test_id += 1 x = x_start y -= test_height return n_ab, test_id