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    • 5. 发明申请
    • SELF-ALIGNED PROCESS
    • 自对准过程
    • WO2016111811A1
    • 2016-07-14
    • PCT/US2015/065719
    • 2015-12-15
    • APPLIED MATERIALS, INC
    • PANDIT, Mandar B.WANG, AnchuanINGLE, Nitin K.
    • H01L21/68
    • H01J37/32412H01J37/32357H01L21/3065H01L21/31116H01L21/31155H01L21/76825H01L21/76897
    • Methods of forming self-aligned structures on patterned substrates are described. The methods may be used to form metal lines or vias without the use of a separate photolithography pattern definition operation. Self-aligned contacts may be produced regardless of the presence of spacer elements. The methods include directionally ion-implanting a gapfill portion of a gapfill silicon oxide layer to implant into the gapfill portion without substantially ion-implanting the remainder of the gapfill silicon oxide layer (the sidewalls). Subsequently, a remote plasma is formed using a fluorine-containing precursor to etch the patterned substrate such that the gapfill portions of silicon oxide are selectively etched relative to other exposed portions exposed parallel to the ion implantation direction. Without ion implantation, the etch operation would be isotropic owing to the remote nature of the plasma excitation during the etch process.
    • 描述了在图案化衬底上形成自对准结构的方法。 该方法可用于形成金属线或通孔而不使用单独的光刻图案定义操作。 可以产生自对准的触点,而不管间隔元件的存在。 所述方法包括定向地离子注入间隙填充氧化硅层的间隙填充部分以注入到间隙填充部分中,而基本上不离子注入间隙填充氧化硅层(侧壁)的剩余部分。 随后,使用含氟前体形成远程等离子体以蚀刻图案化衬底,使得相对于平行于离子注入方向暴露的其它暴露部分选择性地蚀刻氧化硅的间隙填充部分。 在没有离子注入的情况下,蚀刻操作将是各向同性的,这是由于在蚀刻过程期间等离子体激发的远端特性。