Method of forming capped copper interconnects with reduced hillocks
    4.
    发明授权
    Method of forming capped copper interconnects with reduced hillocks 有权
    形成具有减小的小丘的加盖铜互连的方法

    公开(公告)号:US06368948B1

    公开(公告)日:2002-04-09

    申请号:US09626454

    申请日:2000-07-26

    IPC分类号: H01L2120

    CPC分类号: H01L21/76838 H01L21/76834

    摘要: Reliably capped Cu interconnects are formed with a significant reduction in the amount and size of hillocks by reducing the time during which the Cu interconnect is exposed to elevated temperatures for plasma surface treatment and capping layer deposition. Embodiments of the present invention include maintaining a continuous plasma during surface treatment to remove copper oxide and capping layer deposition, and exposing the wafer to elevated temperatures to no greater than 60 seconds in the reaction chamber.

    摘要翻译: 通过减少Cu互连暴露于升高的温度以进行等离子体表面处理和覆盖层沉积的时间,形成可靠的封盖的Cu互连,其显着减少了小丘的数量和尺寸。 本发明的实施例包括在表面处理期间保持连续等离子体以去除氧化铜和封盖层沉积,并将晶片暴露于升高的温度至不超过60秒的反应室中。