Electronic-grade silica sol, a high-purity nano-silica dispersion, is vital for semiconductor polishing, photovoltaic cells, and optical coatings. With controllable particle size (10-100 nm) and exceptional stability, it enables atomic-level planarization, boosting chip performance. Driven by 5G and AI, its global demand grows over 15% annually, with Chinese manufacturers advancing core technologies to break foreign monopolies. This "nano-liquid" may further empower flexible electronics and quantum computing.