Process for electroplating metal into microscopic recessed features
    12.
    发明授权
    Process for electroplating metal into microscopic recessed features 有权
    将金属电镀成微观凹陷特征的工艺

    公开(公告)号:US06946065B1

    公开(公告)日:2005-09-20

    申请号:US09716016

    申请日:2000-11-16

    摘要: Several techniques are described for reducing or mitigating the formation of seams and/or voids in electroplating the interior regions of microscopic recessed features. Cathodic polarization is used to mitigate the deleterious effects of introducing a substrate plated with a seed layer into an electroplating solution. Also described are diffusion-controlled electroplating techniques to provide for bottom-up filling of trenches and vias, avoiding thereby sidewalls growing together to create seams/voids. A preliminary plating step is also described that plates a thin film of conductor on the interior surfaces of features leading to adequate electrical conductivity to the feature bottom, facilitating bottom-up filling.

    摘要翻译: 描述了几种用于减少或减轻在电镀微观凹陷特征的内部区域中的接缝和/或空隙的形成的技术。 阴极极化用于减轻将电镀有种子层的基板引入电镀溶液中的有害影响。 还描述了扩散控制的电镀技术,以提供沟槽和通孔的自下而上的填充,从而避免由此侧壁一起生长以产生接缝/空隙。 还描述了初步电镀步骤,在特征的内表面上镀覆导电薄膜,导致特征底部具有足够的导电性,便于自底向上填充。