Composition and method for metal CMP

    公开(公告)号:US10968366B2

    公开(公告)日:2021-04-06

    申请号:US16208742

    申请日:2018-12-04

    Abstract: A chemical mechanical polishing composition for polishing a substrate includes a liquid carrier and cationic metal oxide abrasive particles dispersed in the liquid carrier. The cationic metal oxide abrasive particles have a surface modified with at least one compound consisting of a silyl group having at least one quaternary ammonium group. A method for chemical mechanical polishing a substrate including a metal 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 metal layer from the substrate and thereby polish the substrate.

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