Ceria powder
    13.
    发明授权
    Ceria powder 失效
    二氧化铈粉

    公开(公告)号:US06238450B1

    公开(公告)日:2001-05-29

    申请号:US09553968

    申请日:2000-04-21

    IPC分类号: C04B3550

    摘要: A polishing slurry, useful in optical or CMP applications, comprises a ceria with a BET surface area of at least 10 m2/gm. The slurry may be made by subjecting a commercial ceria slurry comprising agglomerates to a mechano-chemical treatment at a pH of from 9 to 11 using media that are low purity alpha alumina or zirconia. Preferred slurries maintain a positive surface charge at all pH values. CMP slurries preferably comprise in addition an anionic surfactant to aid in removal of surface residues.

    摘要翻译: 可用于光学或CMP应用的抛光浆料包含BET表面积至少为10m 2 / gm的二氧化铈。 可以通过使用低纯度α氧化铝或氧化锆的介质,使包含附聚物的商业二氧化铈浆料在pH为9至11的机械化学处理下进行制备浆料。 优选的浆料在所有pH值下保持正表面电荷。 CMP浆料优选还包含阴离子表面活性剂以帮助除去表面残留物。