main module#

Test design — the minimum needed to prove the substrate builds.

The circuit is deliberately empty. Part 1’s acceptance is a verified substrate: that it type-checks, translates, and renders a correct cross-section. Placing components, routing, and applying these routing structures to real topologies is JS2 work, so nothing here reaches for a parts query or a route.

What this design does prove: the 41-entry stackup translates, all 12 via structures register off the substrate walk, all 19 fabrication constraints are present, and the four routing structures resolve by impedance. The tests in tests/test_js1_hdi_stackup.py check each of those against the fab CSV.

class EmptyCircuit(*args, **kwargs)[source]#

Bases: Circuit

No components — see the module docstring.

class HDIStackupDesign(*args, **kwargs)[source]#

Bases: Design

The 20-layer HDI substrate on its 80 x 80 mm board.

board: Board = HDIBoard()#

substrate: Substrate = HDISubstrate()#

circuit: Circuit = EmptyCircuit()#