Method for stripping copper in damascene interconnects
    50.
    发明授权
    Method for stripping copper in damascene interconnects 失效
    在大马士革互连中剥离铜的方法

    公开(公告)号:US06394114B1

    公开(公告)日:2002-05-28

    申请号:US09442312

    申请日:1999-11-22

    IPC分类号: C23G114

    摘要: An inexpensive and safe copper removal method in the fabrication of integrated circuits is described. Copper is stripped or removed by a chemical mixture comprising an ammonium salt, an amine, and water. The rate of copper stripping can be controlled by varying the concentration of the ammonium salt component and the amount of water in the mixture. Also a novel chemical mixture for stripping copper and removing copper contamination is provided. The novel chemical mixture for removing or stripping copper comprises an ammonium salt, an amine, and water. For example, the novel chemical mixture may comprise ammonium fluoride, water, and ethylenediamine in a ratio of 1:1:1.

    摘要翻译: 描述了在制造集成电路中的便宜且安全的铜去除方法。 通过包含铵盐,胺和水的化学混合物将铜剥离或除去。 可以通过改变铵盐组分的浓度和混合物中的水量来控制铜汽提速率。 还提供了一种用于剥离铜并除去铜污染物的新型化学混合物。 用于除去或剥离铜的新型化学混合物包括铵盐,胺和水。 例如,新型化学混合物可以包含比例为1:1:1的氟化铵,水和乙二胺。