Method for manufacturing through-silicon via
    2.
    发明授权
    Method for manufacturing through-silicon via 有权
    硅通孔制造方法

    公开(公告)号:US08367553B2

    公开(公告)日:2013-02-05

    申请号:US12962055

    申请日:2010-12-07

    IPC分类号: H01L21/306

    CPC分类号: H01L21/76898 H01L21/7684

    摘要: A method for manufacturing TSVs comprises following steps: A stack structure having a substrate, an ILD layer and a dielectric stop layer is provided, in which an opening penetrating through the ILD layer and the dialectic stop layer and further extending into the substrate is formed. After an insulator layer and a metal barrier are formed on the stack structure, a top metal layer is formed on the stack structure to fulfill the opening. A first planarization process stopping on the metal barrier is conducted, wherein the first planarization process has a polishing rate for removing the metal barrier less than that for removing the top metal layer. A second planarization process stopping on the dielectric stop layer is conducted, wherein the second planarization process has a polishing rate for removing the insulator layer greater than that for removing the dielectric stop layer. The dielectric stop layer is than removed.

    摘要翻译: 制造TSV的方法包括以下步骤:提供具有基板,ILD层和电介质停止层的堆叠结构,其中形成穿透ILD层和辩证阻止层并进一步延伸到基板中的开口。 在堆叠结构上形成绝缘体层和金属屏障之后,在堆叠结构上形成顶部金属层以实现开口。 进行停止在金属屏障上的第一平面化处理,其中第一平面化工艺具有除去金属屏障的抛光速率小于除去顶部金属层的抛光速率。 进行停止在电介质停止层上的第二平坦化工艺,其中第二平坦化工艺具有用于除去绝缘体层的抛光速率大于去除电介质停止层的抛光速率。 电介质停止层除去。