Polishing compositions for noble metals
    4.
    发明授权
    Polishing compositions for noble metals 有权
    贵金属抛光组合物

    公开(公告)号:US07270762B2

    公开(公告)日:2007-09-18

    申请号:US10393071

    申请日:2003-03-20

    IPC分类号: H01L21/302

    CPC分类号: H01L21/3212 C09G1/02 C23F3/06

    摘要: The polishing composition of this invention is useful for chemical-mechanical polishing of substrates containing noble metals such as platinum and comprises up to about 50% by weight of a adjuvant wherein said adjuvant is s elected from a group consisting of a metal-anion compound, a metal-cation compound or mixtures thereof; abrasive particles at about 0.5% to about 55% by weight of the polishing composition; and water-soluble organic additives up to about 10% by weight of the polishing composition. The abrasive particles are selected from the group consisting of alumina, ceria, silica, diamond, germania, zirconia, silicon carbide, boron nitride, boron carbide or mixtures thereof. The organic additives generally improve dispersion of the abrasive particles and also enhance metal removal rates and selectivity for metal removal by stabilizing the pH of the polishing composition and suppressing the dielectric removal rate.

    摘要翻译: 本发明的抛光组合物可用于化学机械抛光含有贵金属如铂的底物,并包含至多约50重量%的佐剂,其中所述佐剂选自金属 - 阴离子化合物, 金属阳离子化合物或其混合物; 磨料颗粒为抛光组合物重量的约0.5%至约55%; 和高达约10重量%的抛光组合物的水溶性有机添加剂。 磨料颗粒选自氧化铝,二氧化铈,二氧化硅,金刚石,氧化锗,氧化锆,碳化硅,氮化硼,碳化硼或其混合物。 有机添加剂通常改善磨料颗粒的分散性,并通过稳定抛光组合物的pH并抑制介电去除速率来提高金属去除速率和金属去除选择性。