Silica sol for the CMP industry
Release date:
2026-01-04
Silica sol is a colloidal system composed of amorphous silica (SiO2) particles at the nanoscale, appearing in liquid form. It is odorless, non-toxic, and non-corrosive, and exhibits excellent resistance to water, weathering, and high temperatures. The particles have small radii and large specific surface areas, providing outstanding filling performance. Typically, these particles carry an electrical charge, making them easy to modify and enabling them to be effectively combined with other organic or inorganic components to achieve synergistic effects.
What is silica sol?
Nanoscale, amorphous silica (SiO2) particles with a colloidal structure, appearing in liquid form; odorless, non-toxic, and non-corrosive, with excellent resistance to water, weathering, and high temperatures. The particles have small radii and a large specific surface area, offering superior filling performance. Typically charged, these particles are easily modified and, when combined with other organic or inorganic components, yield remarkable results.
Application of Silica Sol in the CMP Industry
Silica sol is a widely used soft abrasive in CMP processes. During polishing, it can effectively remove the damaged layer from the workpiece surface and reduce surface roughness. Its excellent chemical stability and controllable particle size distribution enable efficient planarization while ensuring high-quality surface finish on the workpiece.
CMP Plan View
Provide abrasives: Silica sol is the primary raw material used to formulate nano-silica polishing slurries, providing the abrasive particles required during CMP processes to mechanically remove surface damage from workpieces.
Regulate the polishing rate: Adjust the concentration and particle size of the silica sol according to different polishing requirements to achieve the desired polishing rate.
Improve surface quality: The chemical components in the silica sol undergo a chemical reaction with the workpiece surface, softening it. This process, working in synergy with mechanical grinding, enhances the surface quality after polishing.
Product Advantages
Uniform particle size distribution: The particle size is strictly controlled and evenly distributed, which helps ensure consistent polishing results.
High stability: It exhibits excellent dispersion and suspension properties, is resistant to aggregation or sedimentation, helps extend the shelf life of the polishing liquid, and maintains its uniformity.
High purity, low residue: Low impurity content, high purity, minimal residue left on the workpiece surface after polishing, and easy to clean.
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