"yttrium oxide semiconductor coating"

High Purity Ultra Fine Polishing Oxide Cerium Powder 99.999%

Ultra-Clean 5N Cerium Oxide for Precision Optical & Semiconductor Polishing Overview: Lichen High Purity Ultra-Fine Cerium Oxide Polishing Powder (99.999%) is a premium-grade 5N cerium oxide (CeO) engineered for the most demanding precision polishing and surface finishing applications. With ultra-low impurity levels and narrow, ultra-fine particle size distribution, this product delivers exceptional surface smoothness, minimal defect generation, and highly repeatable