BACKSIDE BEVEL PROTECTION
    2.
    发明申请
    BACKSIDE BEVEL PROTECTION 有权
    后备保护

    公开(公告)号:US20120248510A1

    公开(公告)日:2012-10-04

    申请号:US13077257

    申请日:2011-03-31

    IPC分类号: H01L29/772 H01L21/28

    摘要: The disclosure provides methods and structures for preventing exposing polysilicon layer and silicon substrate on the substrate backside to polysilicon etching chemistry during removal of the dummy polysilicon layer in replacement gate structures. A thermal deposition process or processes are used to deposit a dielectric layer for offset spacers and/or a contact etch stop layer (CESL) to cover the polysilicon layer on the substrate backside. Such mechanisms reduce or eliminate particles originated at bevel of substrate backside, due to complete removal of the polysilicon layer at the backside bevel and the resultant etching of silicon substrate.

    摘要翻译: 本公开提供了用于在替代栅极结构中去除虚设多晶硅层期间防止在衬底背面暴露多晶硅蚀刻化学物质的多晶硅层和硅衬底的方法和结构。 使用热沉积工艺或工艺沉积用于偏置间隔物和/或接触蚀刻停止层(CESL)的电介质层以覆盖衬底背面上的多晶硅层。 由于在后侧斜面处的多晶硅层的完全去除以及由此导致的硅衬底的蚀刻,这种机理减少或消除了源自衬底背面的斜面的颗粒。

    Backside bevel protection
    3.
    发明授权
    Backside bevel protection 有权
    背面斜角保护

    公开(公告)号:US08338242B2

    公开(公告)日:2012-12-25

    申请号:US13077257

    申请日:2011-03-31

    IPC分类号: H01L21/338

    摘要: The disclosure provides methods and structures for preventing exposing polysilicon layer and silicon substrate on the substrate backside to polysilicon etching chemistry during removal of the dummy polysilicon layer in replacement gate structures. A thermal deposition process or processes are used to deposit a dielectric layer for offset spacers and/or a contact etch stop layer (CESL) to cover the polysilicon layer on the substrate backside. Such mechanisms reduce or eliminate particles originated at bevel of substrate backside, due to complete removal of the polysilicon layer at the backside bevel and the resultant etching of silicon substrate.

    摘要翻译: 本公开提供了用于在替代栅极结构中去除虚设多晶硅层期间防止在衬底背面暴露多晶硅蚀刻化学物质的多晶硅层和硅衬底的方法和结构。 使用热沉积工艺或工艺沉积用于偏置间隔物和/或接触蚀刻停止层(CESL)的电介质层以覆盖衬底背面上的多晶硅层。 由于在后侧斜面处的多晶硅层的完全去除以及由此导致的硅衬底的蚀刻,这种机理减少或消除了源自衬底背面的斜面的颗粒。