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    • 2. 发明授权
    • Self-aligned multi-patterning for advanced critical dimension contacts
    • 用于高级关键尺寸触点的自对准多图案
    • US08084310B2
    • 2011-12-27
    • US12603371
    • 2009-10-21
    • Bencherki MebarkiLi Yan MiaoChristopher Dennis BencherJen Shu
    • Bencherki MebarkiLi Yan MiaoChristopher Dennis BencherJen Shu
    • H01L21/00
    • H01L21/0337
    • Embodiments of the present invention pertain to methods of forming patterned features on a substrate having a reduced pitch in two dimensions as compared to what is possible using standard photolithography processing techniques using a single high-resolution photomask. A spacer layer is formed over a two-dimensional square grid of cores with a thickness chosen to leave a dimple at the center of four cores on the corners of a square. The spacer layer is etched back to reveal the substrate at the centers of the square. Removing the core material results in double the pattern density of the lithographically defined grid of cores. The regions of exposed substrate may be filled again with core material and the process repeated to quadruple the pattern density.
    • 本发明的实施例涉及在使用单个高分辨率光掩模的标准光刻处理技术的可能性方面,在具有减小的间距的基板上形成图案化特征的方法。 间隔层形成在芯的二维正方形网格上,其厚度被选择为在正方形的角上的四个芯的中心处留下凹坑。 将间隔层回蚀刻以在正方形的中心露出基底。 去除核心材料会导致光刻图形格网格的图案密度增加一倍。 暴露的衬底的区域可以再次用芯材料填充,并且重复该过程以使图案密度增加四倍。