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⎁ Canonical stackup + impedance math

PCB stackup builder.

Pick a layer count and a board class. Get a canonical stackup, a cross-section, and the dielectric thickness needed to hit your impedance target. Optional one-click second opinion from Φ Stack for three alternatives.

#LayerCuThick

Total board mil ( mm)

Microstrip target

  • w =
  • h =
  • Z0 =

Stripline target

  • w =
  • b =
  • Z0 =

Why this stackup

Φ Stack — AI second opinion

Want three alternatives?

The heuristic above gives you one defensible canonical stack. Φ Stack returns three alternatives (cost / balanced / performance) with explicit pros, cons and per-layer notes — useful when the optimization isn’t obvious.

The heuristic above runs offline. Φ Stack adds AI-backed alternatives when a backend is configured (window.PHY_API_BASE).

Want the stackup verified?

PhyVerify is the fast review tier — a senior EE checks impedance, return paths and plane integrity in 48 hours.