from jitx.container import inline
from jitx.si import (
DifferentialRoutingStructure,
RoutingStructure,
symmetric_routing_layers,
)
from jitx.stackup import Conductor, Symmetric
from jitx.substrate import Substrate
from jitx.units import ohm
from jitxlib.physics import phase_velocity
from .materials import Dk_1080, Er_1080, FR4_1080, FR4_Core
from .vias import JLCPCBVias
from .rules import JLCPCBRules
cu_1oz = Conductor(thickness=0.035)
cu_halfoz = Conductor(thickness=0.0175)
med_velocity = phase_velocity((Er_1080 + 1) / 2)
[docs]
class JLC04161H_1080(Substrate, JLCPCBVias):
"""JLC04161H Stackup with 1080 Prepreg"""
[docs]
@inline
class stackup(Symmetric):
"""4 layer stackup with 1080 prepreg"""
top = cu_1oz
prepreg = FR4_1080(thickness=0.0764)
inner = cu_halfoz
core = FR4_Core(thickness=1.265)
constraints = JLCPCBRules()
RS_50 = RoutingStructure(
impedance=50 * ohm,
layers=symmetric_routing_layers(
{
0: RoutingStructure.Layer(
trace_width=0.1176,
clearance=0.2,
velocity=med_velocity,
insertion_loss=Dk_1080,
)
}
),
)
DRS_90 = DifferentialRoutingStructure(
impedance=90 * ohm,
name="90 Ohm Differential Routing Structure",
layers=symmetric_routing_layers(
{
0: DifferentialRoutingStructure.Layer(
trace_width=0.09,
pair_spacing=0.09,
clearance=0.2,
velocity=med_velocity,
insertion_loss=Dk_1080,
),
}
),
uncoupled_region=RoutingStructure(
impedance=90 * ohm,
name="90 Ohm Differential Routing Structure, Uncoupled",
layers=symmetric_routing_layers(
{
0: RoutingStructure.Layer(
trace_width=0.09,
clearance=0.2,
velocity=med_velocity,
insertion_loss=Dk_1080,
),
}
),
),
)
DRS_100 = DifferentialRoutingStructure(
impedance=100 * ohm,
name="100 Ohm Differential Routing Structure",
layers=symmetric_routing_layers(
{
0: DifferentialRoutingStructure.Layer(
trace_width=0.09,
pair_spacing=0.137,
clearance=0.2,
velocity=med_velocity,
insertion_loss=Dk_1080,
)
}
),
uncoupled_region=RoutingStructure(
impedance=100 * ohm,
name="100 Ohm Differential Routing Structure, Uncoupled",
layers=symmetric_routing_layers(
{
0: RoutingStructure.Layer(
trace_width=0.09,
clearance=0.2,
velocity=med_velocity,
insertion_loss=Dk_1080,
)
}
),
),
)
