SELECTIVE THIN METAL CAP PROCESS
    8.
    发明申请
    SELECTIVE THIN METAL CAP PROCESS 有权
    选择性金属金属工艺

    公开(公告)号:US20090053890A1

    公开(公告)日:2009-02-26

    申请号:US11841114

    申请日:2007-08-20

    IPC分类号: H01L21/4763

    摘要: A method of creating metal caps on copper lines within an inter-line dielectric (ILD) deposits a thin (e.g., 5 nm) metal blanket film (e.g., Ta/TaN) on top the copper lines and dielectric, after the wafer has been planarized. Further a thin dielectric cap is formed over the metal blanket film. A photoresist coating is deposited over the thin dielectric cap and a lithographic exposure process is performed, but without a lithographic mask. A mask is not needed in this situation, because due to the reflectivity difference between copper and the ILD lying under the two thin layers, a mask pattern is automatically formed for etching away the Ta/TaN metal cap between copper lines. Thus, this mask pattern is self-aligned above the copper lines.

    摘要翻译: 在线间电介质(ILD)中的铜线上形成金属帽的方法在晶片已经被覆盖之后在铜线和电介质的顶部沉积薄(例如,5nm)金属覆盖膜(例如,Ta / TaN) 平面化 此外,在金属覆盖膜上形成薄的电介质盖。 光致抗蚀剂涂层沉积在薄电介质盖上,并进行光刻曝光工艺,但没有光刻掩模。 在这种情况下不需要掩模,因为由于铜和位于两个薄层之下的ILD之间的反射率差异,自动形成掩模图案以在铜线之间蚀刻掉Ta / TaN金属帽。 因此,该掩模图案在铜线上方自对准。

    METAL CAPPING PROCESS FOR BEOL INTERCONNECT WITH AIR GAPS
    9.
    发明申请
    METAL CAPPING PROCESS FOR BEOL INTERCONNECT WITH AIR GAPS 失效
    用于空气GAPS的BEOL互连的金属封盖工艺

    公开(公告)号:US20080169565A1

    公开(公告)日:2008-07-17

    申请号:US11622188

    申请日:2007-01-11

    IPC分类号: H01L23/48 H01L21/4763

    摘要: The embodiments of the invention provide a metal capping process for a BEOL interconnect with air gaps. More specifically an apparatus is provided comprising metal lines within a first dielectric. Metal caps are over the metal lines, wherein the metal caps contact the metal lines. In addition, air gaps are between the metal lines, wherein the air gaps are between the metal caps. A second dielectric is also provided over the bottom portion of a first dielectric, wherein a top portion of the second dielectric is over the metal caps, and wherein top portions of the first dielectric and bottom portions of the second dielectric comprise sides of the air gap. The apparatus further includes dielectric caps over the metal lines, wherein the dielectric caps contact the metal caps.

    摘要翻译: 本发明的实施例提供了一种用于具有气隙的BEOL互连的金属封盖工艺。 更具体地,提供了一种包括在第一电介质内的金属线的装置。 金属盖在金属线上方,金属帽与金属线接触。 此外,气隙在金属线之间,其中气隙在金属盖之间。 第二电介质还设置在第一电介质的底部上方,其中第二电介质的顶部在金属帽之上,并且其中第二电介质的第一电介质和底部的顶部包括气隙的侧面 。 该装置还包括金属线上的电介质盖,其中介电帽与金属盖接触。

    Metal capping process for BEOL interconnect with air gaps
    10.
    发明授权
    Metal capping process for BEOL interconnect with air gaps 失效
    带气隙的BEOL互连金属封盖工艺

    公开(公告)号:US07666753B2

    公开(公告)日:2010-02-23

    申请号:US11622188

    申请日:2007-01-11

    IPC分类号: H01L21/76

    摘要: The embodiments of the invention provide a metal capping process for a BEOL interconnect with air gaps. More specifically an apparatus is provided comprising metal lines within a first dielectric. Metal caps are over the metal lines, wherein the metal caps contact the metal lines. In addition, air gaps are between the metal lines, wherein the air gaps are between the metal caps. A second dielectric is also provided over the bottom portion of a first dielectric, wherein a top portion of the second dielectric is over the metal caps, and wherein top portions of the first dielectric and bottom portions of the second dielectric comprise sides of the air gap. The apparatus further includes dielectric caps over the metal lines, wherein the dielectric caps contact the metal caps.

    摘要翻译: 本发明的实施例提供了一种用于具有气隙的BEOL互连的金属封盖工艺。 更具体地,提供了一种包括在第一电介质内的金属线的装置。 金属盖在金属线上方,金属帽与金属线接触。 此外,气隙在金属线之间,其中气隙在金属盖之间。 第二电介质还设置在第一电介质的底部上方,其中第二电介质的顶部在金属帽之上,并且其中第二电介质的第一电介质和底部的顶部包括气隙的侧面 。 该装置还包括金属线上的电介质盖,其中介电帽与金属盖接触。