In Plane Permittivity Extraction Using Multiline Thru Reflect Line Test Vehicles
Multiline TRL stripline vehicles isolate in-plane permittivity by extracting propagation constants directly, bypassing transition discontinuities and z-axis bias.
Evaluating in Plane Permittivity Impact on Differential Fringing Fields
Evaluating in-plane permittivity accounts for horizontal field concentration in edge-coupled pairs, preventing 2 to 5 ohm impedance drops in high-density boards.
Anisotropic Permittivity Drift Tolerancing and Glass Fabric Densification in Sequential Lamination High Density Interconnect Buildups
Sequential lamination densifies HDI glass fabric, increasing out-of-plane dielectric constant and driving trace impedance below calculated line targets.
Isotropic versus Anisotropic Dielectric Models in Packaging Substrates
Anisotropic dielectric tensor modeling eliminates up to 8 ohm trace impedance errors and timing skew in high speed package substrates compared to isotropic models.
Air Gap Corrections in Clamped Stripline in Plane Permittivity Extraction
Air gap corrections eliminate systematic two to six percent dielectric underestimation in clamped stripline tests, preventing finished board impedance failures.
Frequency-Domain Tensor Extraction for Multilayer Glass Core Build-Up Packages
Frequency-domain tensor extraction decouples directional permittivity and loss tangent variations on glass core build-up panels, fixing impedance tolerances across sub-THz interconnects.
Anisotropic Permittivity Drift and Resin Flow Variation in Sequential Lamination High Density Interconnect Fabrication
Sub-stack resin squeeze-out during sequential lamination elevates z-axis Dk and reduces dielectric thickness, shifting differential impedance off target.
Sub TeraHertz Spatial Dielectric Anisotropy Characterization in Heterogeneous Substrate Packaging Materials under Extreme Lamination Thermal Excursions
Characterizing spatial dielectric anisotropy under extreme thermal excursions prevents sub-THz phase distortion and catastrophic high-density packaging yield loss.