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    • 4. 发明申请
    • Diamond as a polish-stop layer for chemical-mechanical planarization in a damascene process flow
    • 金刚石作为抛光停止层,用于镶嵌工艺流程中的化学 - 机械平面化
    • US20020048959A1
    • 2002-04-25
    • US10021123
    • 2001-10-30
    • International Business Machines Corporation
    • Lawrence A. ClevengerLouis L. C. HsuJeremy K. StephensMichael Wise
    • H01L021/302H01L021/461H01L021/311
    • H01L21/31053H01L21/28525H01L21/3081H01L21/31144H01L21/3212H01L21/7684
    • A method of using diamond or a diamond-like carbon layer as a polish-stop for patterning a metal level into an inter-level dielectric substrate using a damascene process flow. The diamond or diamond-like carbon layer is deposited onto the surface of the substrate before patterning the metal level. A protective layer is then deposited over the diamond or diamond-like carbon polish-stop layer, wherein such protective layer may act as an additional polish-stop layer. Together, the diamond or diamond-like carbon polish-stop layer and the protective layer are used as a hard-mask for patterning the trenches that will become the metal features, wherein such protective layer protects the diamond or diamond-like carbon polish-stop layer during the patterning process. After deposition of a conductive metal layer, the dielectric substrate is polished to remove excess conductive material, as well as topography. In the polishing process, the diamond or diamond-like carbon polish-stop layer and any remaining protective layer are used as polish-stop layers. The diamond or diamond-like carbon polish-stop layer allows for an improved planar surface, thereby resulting in an sufficient decrease in topography at the surface of the inter-level dielectric.
    • 使用金刚石或类金刚石碳层作为抛光停止件的方法,其使用镶嵌工艺流程将金属层图案化成层间电介质基板。 在图案化金属层之前,将金刚石或类金刚石碳层沉积在基板的表面上。 然后将保护层沉积在金刚石或类金刚石碳抛光层上,其中这种保护层可以用作另外的抛光停止层。 一起使用金刚石或类金刚石碳抛光层和保护层作为用于图案化将成为金属特征的沟槽的硬掩模,其中这种保护层保护金刚石或类金刚石碳抛光 在图案化过程中。 在沉积导电金属层之后,电介质基底被抛光以除去过量的导电材料以及形貌。 在抛光过程中,将金刚石或类金刚石碳抛光层和任何剩余的保护层用作抛光 - 停止层。 金刚石或类金刚石碳抛光层允许改进的平面表面,从而导致层间电介质表面的形貌的充分降低。