Via contact structure having dual silicide layers
    2.
    发明授权
    Via contact structure having dual silicide layers 有权
    具有双重硅化物层的通孔接触结构

    公开(公告)号:US08288828B2

    公开(公告)日:2012-10-16

    申请号:US10711298

    申请日:2004-09-09

    IPC分类号: H01L23/52

    CPC分类号: H01L21/28518 H01L21/76877

    摘要: A via contact is provided to a diffusion region at a top surface of a substrate which includes a single-crystal semiconductor region. The via contact includes a first layer which consists essentially of a silicide of a first metal in contact with the diffusion region at the top surface. A dielectric region overlies the first layer, the dielectric region having an outer surface and an opening extending from the outer surface to the top surface of the substrate. A second layer lines the opening and contacts the top surface of the substrate in the opening, the second layer including a second metal which lines a sidewall of the opening and a silicide of the second metal which is self-aligned to the top surface of the substrate in the opening. A diffusion barrier layer overlies the second layer within the opening. A third layer including a third metal overlies the diffusion barrier layer and fills the opening.

    摘要翻译: 通孔接触被提供到包括单晶半导体区域的衬底的顶表面处的扩散区域。 通孔接触包括第一层,其基本上由与顶表面上的扩散区接触的第一金属的硅化物组成。 电介质区域覆盖在第一层上,电介质区域具有外表面和从衬底的外表面延伸到顶表面的开口。 第二层将开口划线并与开口中的基板的顶表面接触,第二层包括将开口的侧壁排列的第二金属和与第二金属的顶表面自对准的第二金属的硅化物 基材在开口处。 扩散阻挡层覆盖开口内的第二层。 包括第三金属的第三层覆盖扩散阻挡层并填充开口。