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    • 8. 发明申请
    • DOUBLE PATTERNING METHOD
    • 双重图案方法
    • US20140024215A1
    • 2014-01-23
    • US13555306
    • 2012-07-23
    • Kangguo ChengBruce B. DorisAli KhakifiroozYing Zhang
    • Kangguo ChengBruce B. DorisAli KhakifiroozYing Zhang
    • B44C1/22H01B13/00H01L21/308
    • H01L21/3086H01B13/00H01B19/04H01L21/0337H01L21/3081H01L21/32134H01L21/32137
    • Disclosed is an improved double patterning method for forming openings (e.g., vias or trenches) or mesas on a substrate. This method avoids the wafer topography effects seen in prior art double patterning techniques by ensuring that the substrate itself is only subjected to a single etch process. Specifically, in the method, a first mask layer is formed on the substrate and processed such that it has a doped region and multiple undoped regions within the doped region. Then, either the undoped regions or the doped region can be selectively removed in order to form a mask pattern above the substrate. Once the mask pattern is formed, an etch process can be performed to transfer the mask pattern into the substrate. Depending upon whether the undoped regions are removed or the doped region is removed, the mask pattern will form openings (e.g., vias or trenches) or mesas, respectively, on the substrate.
    • 公开了一种用于在基板上形成开口(例如,通孔或沟槽)或台面的改进的双重图案化方法。 该方法通过确保衬底本身仅经历单次蚀刻工艺来避免现有技术的双重图案化技术中所见到的晶片形貌效应。 具体地说,在该方法中,在衬底上形成第一掩模层并进行处理,使得其在掺杂区域内具有掺杂区域和多个未掺杂区域。 然后,可以选择性地去除未掺杂区域或掺杂区域,以在衬底上方形成掩模图案。 一旦形成掩模图案,就可以执行蚀刻工艺以将掩模图案转印到基板中。 取决于未掺杂的区域是去除还是去除掺杂区域,掩模图案将分别在衬底上形成开口(例如,通孔或沟槽)或台面。