MIXED ABRASIVE TUNGSTEN CMP COMPOSITION
    35.
    发明申请
    MIXED ABRASIVE TUNGSTEN CMP COMPOSITION 有权
    混合磨料铁素体组合物

    公开(公告)号:US20150267082A1

    公开(公告)日:2015-09-24

    申请号:US14222716

    申请日:2014-03-24

    CPC classification number: C09G1/02 H01L21/30625 H01L21/3212

    Abstract: A chemical mechanical polishing composition includes a water based liquid carrier and first and second silica abrasives dispersed in the liquid carrier. The first silica abrasive is a colloidal silica abrasive having a permanent positive charge of at least 10 mV. The second silica abrasive has a neutral charge or a non-permanent positive charge. A method for chemical mechanical polishing a substrate including a tungsten layer includes contacting the substrate with the above described polishing composition, moving the polishing composition relative to the substrate, and abrading the substrate to remove a portion of the tungsten from the substrate and thereby polish the substrate.

    Abstract translation: 化学机械抛光组合物包括水基液体载体和分散在液体载体中的第一和第二二氧化硅研磨剂。 第一种二氧化硅研磨剂是具有至少10mV的永久正电荷的胶体二氧化硅研磨剂。 第二硅石磨料具有中性电荷或非永久正电荷。 用于化学机械抛光包括钨层的基材的方法包括使基底与上述抛光组合物接触,使抛光组合物相对于基底移动,并研磨基底以从基底去除一部分钨,从而抛光 基质。

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