DOUBLE PATTERNING STRATEGY FOR CONTACT HOLE AND TRENCH IN PHOTOLITHOGRAPHY
    4.
    发明申请
    DOUBLE PATTERNING STRATEGY FOR CONTACT HOLE AND TRENCH IN PHOTOLITHOGRAPHY 有权
    用于接触孔的双重图案策略和光刻胶中的TRENCH

    公开(公告)号:US20110195576A1

    公开(公告)日:2011-08-11

    申请号:US12701927

    申请日:2010-02-08

    IPC分类号: H01L21/311

    摘要: A method of lithography patterning includes forming a first etch stop layer, a second etch stop layer, and a hard mask layer on a material layer. The materials of the first etch stop layer and the second etch stop layer are selected by the way that there is a material gradient composition between the second etch stop layer, the first etch stop layer, and the material layer. Hence, gradient etching rates between the second etch stop layer, the first etch stop layer, and the material layer are achieved in an etching process to form etched patterns with smooth and/or vertical sidewalls within the second and the first etch stop layers and the material layer.

    摘要翻译: 光刻图案的方法包括在材料层上形成第一蚀刻停止层,第二蚀刻停止层和硬掩模层。 通过在第二蚀刻停止层,第一蚀刻停止层和材料层之间存在材料梯度组成的方式来选择第一蚀刻停止层和第二蚀刻停止层的材料。 因此,在蚀刻工艺中实现第二蚀刻停止层,第一蚀刻停止层和材料层之间的梯度蚀刻速率,以在第二和第一蚀刻停止层内形成具有平滑和/或垂直侧壁的蚀刻图案,并且 材料层。