Submicron Spherical Silica Filler 0.9–1.2μm CAS 7631-86-9, for EMC CPO High-Filling Low-Viscosity Resin
Submicron spherical silica filler ranging 0.9‑1.2μm, CAS 7631‑86‑9. Manufactured by high‑temperature fusion and precise air‑classification to obtain uniform amorphous spherical particles. The filler permits high mineral loading while keeping favorable resin fluidity, and is applied in EMC and CPO high‑filling low‑viscosity encapsulation resin to lower thermal expansion and enhance the mechanical reliability of semiconductor packages.
Product Detail PageSubmicron Spherical Silica Filler 0.9‑1.2μm CAS 7631‑86‑9, for EMC CPO High‑Filling Low‑Viscosity ResinThis submicron spherical silica filler is produced through high‑temperature fusion, spheronization and multi‑stage air classification, delivering a controlled particle‑size band from 0.9 μm to 1.2 μm with amorphous silica structure. Rigorous classification steps eliminate oversized coarse particles that could scratch silicon dies or fine circuit structures during semiconductor molding processes.
The regular spherical particle geometry reduces inter‑particle friction within epoxy resin matrices. This rheological advantage makes it possible to achieve high filler loading while maintaining relatively low slurry viscosity, which is the core requirement for high‑filling EMC and CPO encapsulation resin. Higher silica loading effectively decreases the coefficient of thermal expansion of cured molding compound, minimizing thermally generated stress between the encapsulant and silicon chip when the packaged device undergoes repeated temperature cycling. It reduces failure risks including package delamination, internal micro‑cracks and solder joint fatigue for CPO and conventional semiconductor packages.
Tight control over ionic and metallic impurities ensures excellent electrical insulation performance of the final cured composite, preventing leakage current under high‑temperature and humid operating environments for microelectronic components. This silica filler shows good intrinsic compatibility with standard epoxy‑phenolic EMC formulations. Silane surface treatment can be performed on request to strengthen the interfacial bonding between silica particles and resin matrix, further improving composite mechanical strength and moisture resistance.
Graded particle blending with coarser or finer silica fractions can be implemented to tailor formulation rheology according to different EMC transfer‑molding parameters and CPO encapsulation process specifications. The powder material must be sealed and stored in a dry environment to avoid moisture‑induced agglomeration. Cross‑contamination with other silica grades or mineral fillers should be strictly avoided during weighing, feeding and compounding operations. This 0.9‑1.2 μm submicron spherical silica filler is a reliable functional inorganic filler for high‑filling low‑viscosity EMC and CPO semiconductor encapsulation resin systems
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Submicron Spherical Silica Filler 0.9–1.2μm CAS 7631-86-9, for EMC CPO High-Filling Low-Viscosity Resin
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