INTERCONNECTION STRUCTURE AND METHOD OF FORMING THE SAME
    2.
    发明申请
    INTERCONNECTION STRUCTURE AND METHOD OF FORMING THE SAME 审中-公开
    互连结构及其形成方法

    公开(公告)号:US20120181070A1

    公开(公告)日:2012-07-19

    申请号:US13431127

    申请日:2012-03-27

    IPC分类号: H05K1/09 B05D3/00 B05D5/12

    摘要: After a copper interconnection is formed above a substrate, a surface of the copper interconnection is activated by performing acid cleaning. Thereafter, the substrate is immersed in a BTA (Benzo triazole) aqueous solution to form a protection film covering the surface of the copper interconnection. At this time, Cu—N—R bonds (R is an organic group) are formed in grain boundary portions in the surface of the copper interconnection. Thereafter, the protection film is removed by performing alkaline cleaning. The Cu—N—R bonds remain in the grain boundary portions in the surface of the copper interconnection even after the protection film is removed. Subsequently, the surface of the copper interconnection is subjected to an activation process, and a barrier layer is formed thereafter by electroless-plating the surface of the copper interconnection with NiP or CoWP.

    摘要翻译: 在基板上形成铜互连之后,通过进行酸清洗来激活铜互连的表面。 此后,将基板浸入BTA(苯并三唑)水溶液中以形成覆盖铜互连表面的保护膜。 此时,在铜互连表面的晶界部分中形成Cu-N-R键(R为有机基团)。 此后,通过进行碱性清洗除去保护膜。 即使在保护膜被去除之后,Cu-N-R键也保留在铜互连表面的晶界部分中。 随后,对铜互连的表面进行激活处理,然后通过用NiP或CoWP对铜互连的表面进行无电镀来形成阻挡层。