ABF GX92

Dielectric Thickness

Controlled resin flow establishes the final dielectric thickness of ABF GX92 after thermal press cycles complete. Micrometer readings across panel corners verify planar uniformity before subsequent desmear chemistry etches exposed glass fiber bundles. Surface roughness parameters dictate adhesion values for electroless copper deposition during seed layer formation.

Acoustic microscopy scans locate internal voids within the laminated dielectric stack by detecting acoustic impedance mismatches at material interfaces. Dielectric breakdown voltage thresholds drop sharply when moisture absorption exceeds manufacturer limits prior to outer layer lamination.

Desmear Resistance

Chemical permanganate attacks dissolve exposed resin fragments surrounding inner layer copper interconnects anchored by ABF GX92. Weight loss percentages quantify chemical resistance during descum stages before palladium catalyst seeding initiates electroless metallization. Peel strength values drop when over-etching exposes excessive glass reinforcement beneath the dielectric boundary.

Cross-sectional microsectioning confirms complete resin removal from laser-drilled blind via floors without attacking the underlying copper pad. ABF GX92 withstands thermal excursions during subsequent lead-free assembly without experiencing inner layer separation or dielectric cracking.