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    PROCESS FOR ELECTROLESS COPPER DEPOSITION ON A RUTHENIUM SEED
    1.
    发明申请
    PROCESS FOR ELECTROLESS COPPER DEPOSITION ON A RUTHENIUM SEED 审中-公开
    电镀铜沉积方法

    公开(公告)号：US20120315756A1

    公开(公告)日：2012-12-13

    申请号：US13421434

    申请日：2012-03-15

    申请人： Timothy W. Weidman ,  Arulkumar Shanmugasundram ,  Kapila Wijekoon ,  Schubert S. Chu ,  Frederick C. Wu ,  Kavita Shah

    发明人： Timothy W. Weidman ,  Arulkumar Shanmugasundram ,  Kapila Wijekoon ,  Schubert S. Chu ,  Frederick C. Wu ,  Kavita Shah

    IPC分类号： H01L21/768

    CPC分类号： C23C18/40 ,  C23C18/1608 ,  C23C18/165 ,  H01L21/288 ,  H01L21/76802 ,  H01L21/76831 ,  H01L21/76843 ,  H01L21/76844 ,  H01L21/76849 ,  H01L21/76864 ,  H01L21/76873 ,  H01L21/76874 ,  H01L21/76877

    摘要： Embodiments of the invention provide methods for forming conductive materials within contact features on a substrate by depositing a seed layer within a feature and subsequently filling the feature with a copper-containing material during an electroless deposition process. In one example, a copper electroless deposition solution contains levelers to form convexed or concaved copper surfaces. In another example, a seed layer is selectively deposited on the bottom surface of the aperture while leaving the sidewalls substantially free of the seed material during a collimated PVD process. In another example, the seed layer is conformably deposited by a PVD process and subsequently, a portion of the seed layer and the underlayer are plasma etched to expose an underlying contact surface. In another example, a ruthenium seed layer is formed on an exposed contact surface by an ALD process utilizing the chemical precursor ruthenium tetroxide.

    摘要翻译： 本发明的实施例提供了通过在特征内沉积种子层并随后在无电沉积工艺期间用含铜材料填充该特征而在基底上的接触特征内形成导电材料的方法。 在一个实例中，铜无电解沉积溶液含有形成凸形或凹陷铜表面的矫直机。 在另一个实例中，在准直的PVD工艺期间，将籽晶层选择性地沉积在孔的底表面上，同时留下基本上不含种子材料的侧壁。 在另一个实例中，种子层通过PVD工艺顺应地沉积，随后种子层和底层的一部分被等离子体蚀刻以暴露下面的接触表面。 在另一个实例中，通过使用化学前体四氧化钌的ALD工艺在暴露的接触表面上形成钌籽晶层。