Staging hydraulic lamination pressure and damping heating rates above dynamic viscosity minimums prevents hydrodynamic resin shear from displacing heavy copper inner conductors.
Optimizing inner layer registration requires balancing thermal expansion tolerances through four-slot pinning while managing prepreg viscosity windows under staged pressure.
Analytical squeeze flow models predict trace swim by calculating hydrodynamic drag and side-wall pressure differentials across fine copper features during lamination.
Stackup thickness control requires calculating pressed prepreg heights over local copper patterns to hold impedance and microvia drilling tolerances.
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