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    • 9. 发明申请
    • MANDREL/TRIM ALIGNMENT IN SIT PROCESSING
    • 处理中的MANDREL / TRIM对齐
    • US20080188080A1
    • 2008-08-07
    • US12062618
    • 2008-04-04
    • Toshiharu FurukawaDavid V. HorakCharles W. KoburgerQiqing C. Quyang
    • Toshiharu FurukawaDavid V. HorakCharles W. KoburgerQiqing C. Quyang
    • H01L21/311H01L21/467
    • H01L21/28132H01L21/0337H01L21/0338H01L29/66795
    • Disclosed herein is an imaging method for patterning component shapes (e.g., fins, gate electrodes, etc.) into a substrate. By conducting a trim step prior to performing either an additive or subtractive sidewall image transfer process, the method avoids the formation of a loop pattern in a hard mask and, thus, avoids a post-SIT process trim step requiring alignment of a trim mask to sub-lithographic features to form a hard mask pattern with the discrete segments. In one embodiment a hard mask is trimmed prior to conducting an additive SIT process so that a loop pattern is not formed. In another embodiment an oxide layer and memory layer that are used to form a mandrel are trimmed prior to the conducting a subtractive SIT process. A mask is then used to protect portions of the mandrel during etch back of the oxide layer so that a loop pattern is not formed.
    • 本文公开了一种用于将部件形状(例如散热片,栅电极等)图案化成基板的成像方法。 通过在执行加法或减损侧壁图像转移处理之前进行修整步骤,该方法避免了在硬掩模中形成环形图案,并且因此避免了后SIT工艺修整步骤,需要修剪蒙版对准 亚光刻特征以形成具有离散片段的硬掩模图案。 在一个实施例中,在进行添加SIT处理之前修剪硬掩模,使得不形成环形图案。 在另一个实施例中,用于形成心轴的氧化物层和记忆层在进行减法SIT处理之前被修整。 然后在氧化层的回蚀刻期间使用掩模来保护心轴的部分,使得不形成环形图案。