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    • 7. 发明授权
    • Method for reducing resist height erosion in a gate etch process
    • 在栅极蚀刻工艺中降低抗蚀剂高度腐蚀的方法
    • US07005386B1
    • 2006-02-28
    • US10656467
    • 2003-09-05
    • Scott BellSrikanteswara Dakshina-MurthyChih-Yuh YangAshok M. Khathuria
    • Scott BellSrikanteswara Dakshina-MurthyChih-Yuh YangAshok M. Khathuria
    • H01L21/302
    • H01L21/32139H01L21/0274H01L21/31058
    • According to one exemplary embodiment, a method for reducing resist height erosion in a gate etch process comprises a step of forming a first resist mask on an anti-reflective coating layer situated over a substrate, where the first resist mask has a first width. The anti-reflective coating layer may be, for example, an organic material. The method further comprises a step of trimming the first resist mask to form a second resist mask, where the second resist mask has a second width, and where the second width is less than the first width. The step of trimming the first resist mask may further comprise, for example, etching the anti-reflective coating layer. According to this exemplary embodiment, the method further comprises a step of performing an HBr plasma treatment on the second resist mask, wherein the HBr plasma treatment causes a vertical etch rate of the second resist mask to decrease.
    • 根据一个示例性实施例,用于降低栅极蚀刻工艺中的抗蚀剂高度腐蚀的方法包括在位于衬底上的抗反射涂层上形成第一抗蚀剂掩模的步骤,其中第一抗蚀剂掩模具有第一宽度。 抗反射涂层可以是例如有机材料。 该方法还包括修整第一抗蚀剂掩模以形成第二抗蚀剂掩模的步骤,其中第二抗蚀剂掩模具有第二宽度,并且其中第二宽度小于第一宽度。 修整第一抗蚀剂掩模的步骤还可以包括例如蚀刻抗反射涂层。 根据该示例性实施例,该方法还包括在第二抗蚀剂掩模上执行HBr等离子体处理的步骤,其中HBr等离子体处理导致第二抗蚀剂掩模的垂直蚀刻速率降低。