def align_wafer(
width=10,
spacing=10,
cross_length=80,
layer=pp.LAYER.WG,
with_tile_excl=True,
square_corner="bottom_left",
):
""" returns cross inside a frame to align wafer
.. plot::
:include-source:
import pp
c = pp.c.fidutial()
pp.plotgds(c)
"""
c = pp.Component()
cross = pp.c.cross(length=cross_length, width=width, layer=layer)
c.add_ref(cross)
b = cross_length / 2 + spacing + width / 2
w = width
c.add
rh = rectangle_centered(w=2 * b + w, h=w, layer=layer)
rtop = c.add_ref(rh)
rbot = c.add_ref(rh)
rtop.movey(+b)
rbot.movey(-b)
rv = rectangle_centered(w=w, h=2 * b, layer=layer)
rl = c.add_ref(rv)
rr = c.add_ref(rv)
rl.movex(-b)
rr.movex(+b)
wsq = (cross_length + 2 * spacing) / 4
square_mark = c << rectangle_centered(w=wsq, h=wsq, layer=layer)
a = width / 2 + wsq / 2 + spacing
corner_to_position = {
"bottom_left": (-a, -a),
"bottom_right": (a, -a),
"top_right": (a, a),
"top_left": (-a, a),
}
square_mark.move(corner_to_position[square_corner])
if with_tile_excl:
rc_tile_excl = rectangle_centered(w=2 * (b + spacing),
h=2 * (b + spacing),
layer=pp.layer("no_tile_si"))
c.add_ref(rc_tile_excl)
return c
def add_frame(component, width=10, spacing=10, layer=pp.LAYER.WG):
""" returns component with a frame around it
"""
c = pp.Component()
cref = c.add_ref(component)
cref.move(-c.size_info.center)
b = component.size_info.height / 2 + spacing + width / 2
w = width
rh = rectangle_centered(w=2 * b + w, h=w, layer=layer)
rtop = c.add_ref(rh)
rbot = c.add_ref(rh)
rtop.movey(+b)
rbot.movey(-b)
rv = rectangle_centered(w=w, h=2 * b, layer=layer)
rl = c.add_ref(rv)
rr = c.add_ref(rv)
rl.movex(-b)
rr.movex(+b)
c.absorb(cref)
rc = rectangle_centered(w=2 * (b + spacing),
h=2 * (b + spacing),
layer=pp.LAYER.NO_TILE_SI)
c.add_ref(rc)
return c
def pads_shorted(width=100, n_pads=8, pad_spacing=150, layer=LAYER.M1):
c = Component(name="shorted_pads")
pad = rectangle_centered(x=width, y=width, layer=layer)
for i in range(n_pads):
pad_ref = c.add_ref(pad)
pad_ref.movex(i * pad_spacing - n_pads / 2 * pad_spacing +
pad_spacing / 2)
short = rectangle_centered(x=pad_spacing * (n_pads - 1), y=10, layer=layer)
c.add_ref(short)
return c