Preventing silicide formation at the gate electrode in a replacement metal gate technology
    13.
    发明授权
    Preventing silicide formation at the gate electrode in a replacement metal gate technology 失效
    在替代金属栅极技术中防止栅电极处的硅化物形成

    公开(公告)号:US07754552B2

    公开(公告)日:2010-07-13

    申请号:US10629127

    申请日:2003-07-29

    IPC分类号: H01L21/338

    CPC分类号: H01L29/66545

    摘要: A hard mask may be formed and maintained over a polysilicon gate structure in a metal gate replacement technology. The maintenance of the hard mask, such as a nitride hard mask, may protect the polysilicon gate structure 14 from the formation of silicide or etch byproducts. Either the silicide or the etch byproducts or their combination may block the ensuing polysilicon etch which is needed to remove the polysilicon gate structure and to thereafter replace it with an appropriate metal gate technology.

    摘要翻译: 在金属栅极替换技术中,可以在多晶硅栅极结构上形成并保持硬掩模。 硬掩模(例如氮化物硬掩模)的维护可以保护多晶硅栅极结构14免受硅化物或蚀刻副产物的形成。 硅化物或蚀刻副产物或它们的组合可以阻止除去多晶硅栅极结构所需的随后的多晶硅蚀刻,然后用适当的金属栅极技术代替它。