Method of Forming Fine Pitch Hardmask Patterns and Method of Forming Fine Patterns of Semiconductor Device Using the Same
    21.
    发明申请
    Method of Forming Fine Pitch Hardmask Patterns and Method of Forming Fine Patterns of Semiconductor Device Using the Same 有权
    形成精细间距硬掩模图案的方法和使用其形成半导体器件的精细图案的方法

    公开(公告)号:US20080014752A1

    公开(公告)日:2008-01-17

    申请号:US11738155

    申请日:2007-04-20

    IPC分类号: H01L21/311

    摘要: A method of forming fine pitch hardmask patterns includes forming a hardmask layer on a substrate and forming a plurality of first mask patterns on the hardmask layer. A buffer layer is formed on the plurality of first mask patterns, and has an upper surface defining recesses between adjacent first mask patterns. Second mask patterns are formed within the recesses formed in the upper surface of the buffer layer. The buffer layer is partially removed to expose upper surfaces of the plurality of first mask patterns, and the buffer layer is then partially removed using the first mask patterns and the second mask patterns as an etch mask to expose the hardmask layer between the first mask pattern and the second mask pattern. Using the first mask patterns and the second mask patterns as an etch mask, the hardmask layer is etched to form hardmask patterns.

    摘要翻译: 形成细间距硬掩模图案的方法包括在基底上形成硬掩模层并在硬掩模层上形成多个第一掩模图案。 缓冲层形成在多个第一掩模图案上,并且具有在相邻的第一掩模图案之间限定凹部的上表面。 在形成在缓冲层的上表面中的凹部内形成第二掩模图案。 部分地去除缓冲层以暴露多个第一掩模图案的上表面,然后使用第一掩模图案和第二掩模图案作为蚀刻掩模来部分地去除缓冲层,以在第一掩模图案之间暴露硬掩模层 和第二掩模图案。 使用第一掩模图案和第二掩模图案作为蚀刻掩模,硬掩模层被蚀刻以形成硬掩模图案。