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_7628, Er_7628, Er_core, FR4_7628, FR4_Core
from .vias import JLCPCBVias
from .rules import JLCPCBRules
cu_1oz = Conductor(thickness=0.035)
cu_halfoz = Conductor(thickness=0.0152)
ext_velocity = phase_velocity((Er_7628 + 1) / 2)
int_velocity = phase_velocity((Er_7628 + Er_core) / 2)
[docs]
class JLC06161H_7628(Substrate, JLCPCBVias):
"""JLC06161H Stackup with 7628 Prepreg"""
[docs]
@inline
class stackup(Symmetric):
"""6 layer stackup with 7628 prepreg"""
top = cu_1oz
outer_prepreg = FR4_7628(thickness=0.2104)
inner_1 = cu_halfoz
core = FR4_Core(thickness=0.2104)
inner_2 = cu_halfoz
middle_prepreg = FR4_7628(thickness=0.2028)
constraints = JLCPCBRules()
RS_50 = RoutingStructure(
impedance=50 * ohm,
layers=symmetric_routing_layers(
{
0: RoutingStructure.Layer(
trace_width=0.3421,
clearance=0.5,
velocity=ext_velocity,
insertion_loss=Dk_7628,
),
1: RoutingStructure.Layer(
trace_width=0.2230,
clearance=0.3,
velocity=int_velocity,
insertion_loss=Dk_7628,
),
}
),
)
DRS_100 = DifferentialRoutingStructure(
impedance=100 * ohm,
layers=symmetric_routing_layers(
{
0: DifferentialRoutingStructure.Layer(
trace_width=0.1722,
pair_spacing=0.15,
clearance=0.3,
velocity=ext_velocity,
insertion_loss=Dk_7628,
),
1: DifferentialRoutingStructure.Layer(
trace_width=0.1298,
pair_spacing=0.15,
clearance=0.3,
velocity=int_velocity,
insertion_loss=Dk_7628,
),
}
),
uncoupled_region=RoutingStructure(
impedance=100 * ohm,
layers=symmetric_routing_layers(
{
0: RoutingStructure.Layer(
trace_width=0.1722,
clearance=0.15,
velocity=ext_velocity,
insertion_loss=Dk_7628,
),
1: RoutingStructure.Layer(
trace_width=0.1298,
clearance=0.15,
velocity=int_velocity,
insertion_loss=Dk_7628,
),
}
),
),
)
