Predictive squeeze flow modeling couples chemorheology and layout copper density to prevent microvia voiding, trace swimming, and dielectric thickness drift.
Non-isothermal squeeze flow and anisotropic permeability dictate prepreg filling, requiring precise press ramps to prevent dielectric micro-voiding.
Precise thermal ramp and platen pressure sequencing optimize resin viscosity windows to eliminate voids, core wash, and dielectric drift in ultrathin multilayers.
Analytical squeeze flow models predict trace swim by calculating hydrodynamic drag and side-wall pressure differentials across fine copper features during lamination.
Modelling slip velocity and pressure gradients across smooth copper foils prevents resin starvation and locks dielectric thickness tolerances during lamination.
Multilayer PCB lamination relies on managing dynamic resin viscosity and glass fabric permeability to fill copper features without starving dielectric layers.
Non-Newtonian resin flow inside thin prepreg micro-channels governs void formation, trace displacement, and dielectric thickness stability during high-pressure lamination.
Sub-30 µm dielectric void suppression requires matching non-Newtonian dynamic viscosity to vacuum press ramps to maintain shear flow prior to cross-linking gelation.
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