METHOD FOR ACHIEVING COPPER FILL OF HIGH ASPECT RATIO INTERCONNECT FEATURES
    1.
    发明申请
    METHOD FOR ACHIEVING COPPER FILL OF HIGH ASPECT RATIO INTERCONNECT FEATURES 审中-公开
    实现高比例互连特征铜箔的方法

    公开(公告)号:WO0219418A3

    公开(公告)日:2003-05-08

    申请号:PCT/US0126597

    申请日:2001-08-27

    CPC classification number: H01L21/2885 H01L21/76877

    Abstract: One aspect of the invention provides a consistent metal electroplating technique to form void-less metal interconnects in sub-micron high aspect ratio features on semiconductor substrates. One embodiment of the invention provides a method for filling sub-micron features (214) on a substrate, comprising reactive precleaning the substrate, depositing a barrier layer (218) on the substrate using high density plasma physical vapor deposition; depositing a seed layer (220) over the barrier layer using high density plasma physical vapor deposition; and electro-chemically depositing a metal (222) using a highly resistive electrolyte and applying a first current density during a first deposition period followed by a second current density during a second period.

    Abstract translation: 本发明的一个方面提供一致的金属电镀技术,以在半导体衬底上形成亚微米高纵横比特征的无空隙金属互连。 本发明的一个实施例提供了一种用于在基底上填充亚微米特征(214)的方法,其包括反应性预清洗所述基底,使用高密度等离子体物理气相沉积在所述基底上沉积阻挡层(218) 使用高密度等离子体物理气相沉积在阻挡层上沉积种子层(220); 以及使用高电阻电解质电化学沉积金属(222),并且在第一周期期间在第一沉积周期期间施加第一电流密度,然后施加第二电流密度。

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