METHODS OF REMOVING METAL OXIDE USING CLEANING PLASMA

    公开(公告)号:US20240167148A1

    公开(公告)日:2024-05-23

    申请号:US17989767

    申请日:2022-11-18

    IPC分类号: C23C16/02 B08B7/00 C23C16/06

    摘要: Embodiments of the disclosure are directed to methods of removing metal oxide from a substrate surface by exposing the substrate surface to an un-biased cleaning plasma comprising a mixture of hydrogen (H2) and oxygen (O2). In some embodiments, the substrate surface has at least one feature thereon, the at least one feature defining a trench having a top surface, a bottom surface, and two opposed sidewalls. The un-biased cleaning plasma comprises in a range of from 1% to 20% oxygen (O2) on a molecular basis and greater than or equal to 80% hydrogen (H2). The un-biased cleaning plasma removes substantially all of the metal oxide—such as molybdenum oxide (MoOx), ruthenium oxide (RuOx), or tungsten oxide (WOx)—from the substrate surface, and the top surface, the bottom surface, and the two opposed sidewalls of the trench without damaging the dielectric and/or critical dimension (CD)/profile of the structure.