Modified via bottom structure for reliability enhancement
    6.
    发明授权
    Modified via bottom structure for reliability enhancement 有权
    通过底部结构改进可靠性增强

    公开(公告)号:US07906428B2

    公开(公告)日:2011-03-15

    申请号:US12121216

    申请日:2008-05-15

    IPC分类号: H01L21/4763

    摘要: The present invention provides an interconnect structure that can be made in the BEOL which exhibits good mechanical contact during normal chip operations and does not fail during various reliability tests as compared with the conventional interconnect structures described above. The inventive interconnect structure has a kinked interface at the bottom of a via that is located within an interlayer dielectric layer. Specifically, the inventive interconnect structure includes a first dielectric layer having at least one metallic interconnect embedded within a surface thereof; a second dielectric layer located atop the first dielectric layer, wherein said second dielectric layer has at least one aperture having an upper line region and a lower via region, wherein the lower via region includes a kinked interface; at least one pair of liners located on at least vertical walls of the at least one aperture; and a conductive material filling the at least one aperture.

    摘要翻译: 本发明提供一种可以在BEOL中制造的互连结构,其在正常的芯片操作期间表现出良好的机械接触,并且在与上述的常规互连结构相比在各种可靠性测试期间不会失败。 本发明的互连结构在通孔的底部具有位于层间介质层内的扭结界面。 具体地,本发明的互连结构包括:第一介电层,其具有嵌入在其表面内的至少一个金属互连; 位于所述第一介电层顶部的第二电介质层,其中所述第二电介质层具有至少一个具有上线区域和下通孔区域的孔,其中所述下通孔区域包括扭结界面; 位于所述至少一个孔的至少垂直壁上的至少一对衬垫; 以及填充所述至少一个孔的导电材料。