SEMICONDUCTOR DEVICE HAVING A SELF-FORMING BARRIER LAYER AT VIA BOTTOM
    1.
    发明申请
    SEMICONDUCTOR DEVICE HAVING A SELF-FORMING BARRIER LAYER AT VIA BOTTOM 有权
    具有穿过底部的自制障碍层的半导体器件

    公开(公告)号:US20140097538A1

    公开(公告)日:2014-04-10

    申请号:US13648433

    申请日:2012-10-10

    IPC分类号: H01L21/768 H01L23/48

    摘要: An approach for forming a semiconductor device is provided. In general, the device is formed by providing a metal layer, a cap layer over the metal layer, and an ultra low k layer over the cap layer. A via is then formed through the ultra low k layer and the cap layer. Once the via is formed, a barrier layer (e.g., cobalt (Co), tantalum (Ta), cobalt-tungsten-phosphide (CoWP), or other metal capable of acting as a copper (CU) diffusion barrier) is selectively applied to a bottom surface of the via. A liner layer (e.g., manganese (MN) or aluminum (AL)) is then applied to a set of sidewalls of the via. The via may then be filled with a subsequent metal layer (with or without a seed layer), and the device may the then be further processed (e.g., annealed).

    摘要翻译: 提供了一种用于形成半导体器件的方法。 通常,通过在金属层上设置金属层,覆盖层和覆盖层上的超低k层来形成器件。 然后通过超低k层和盖层形成通孔。 一旦形成通孔,就可以选择性地将阻挡层(例如,钴(Co),钽(Ta),钴 - 钨 - 磷化物(CoWP)或能够充当铜(CU)扩散阻挡层的其它金属) 通孔的底面。 然后将衬垫层(例如锰(MN)或铝(AL))施加到通孔的一组侧壁。 然后可以用随后的金属层(具有或不具有种子层)填充通孔,然后可以进一步处理(例如,退火)该器件。