Reinforcement Medium
Woven textiles composed of high-purity silicon dioxide filaments provide mechanical structure and dimensional control to advanced electronic substrates. Laminators select silica fiber fabric to reinforce resin matrices where low signal loss and low thermal expansion are critical. This reinforcement has a lower dielectric constant than traditional E-glass, enhancing the speed of high-frequency digital signals.
Thermal Capability
Extreme temperature environments demand materials that resist expansion along the planar axes of the board. The presence of silica fiber fabric restricts the thermal movement of the resin matrix during lead-free assembly and drilling. Because pure silica has a coefficient of thermal expansion of less than one part per million per degree Celsius, laminates reinforced with this material exhibit dimensional stability that protects delicate microvias from shearing forces.
This thermal behavior prevents the rupture of plated through-holes during thermal shock testing.
Processing Demand
Machining composite panels with high quartz or silica content increases tool wear during drilling. Because silica fiber fabric is mechanically hard, it requires specialized carbide or diamond-coated drill bits to prevent hole wall roughness and drill bit deflection. Optimizing the drill feed rates and speed parameters ensures clean cuts without tearing the fiber bundles, which prevents the formation of conductive anodic filament paths between adjacent vias.
