Dual damascene method for ultra low K dielectrics
    102.
    发明授权
    Dual damascene method for ultra low K dielectrics 有权
    用于超低K电介质的双镶嵌方法

    公开(公告)号:US07094683B2

    公开(公告)日:2006-08-22

    申请号:US10633909

    申请日:2003-08-04

    IPC分类号: H01L21/4763

    CPC分类号: H01L21/76807 H01L21/76804

    摘要: A method for forming a dual damascene opening to protect a low-K dielectric insulating layer including providing a semiconductor process wafer comprising a via opening extending though a thickness portion of at least one dielectric insulating layer; depositing a first dielectric layer stack layer comprising at least one dielectric insulating layer over the at least one dielectric insulating to seal the via opening; blanket depositing a second dielectric layer stack comprising at least one dielectric layer to form a hardmask over and contacting the first dielectric layer stack; photolithographically patterning and etching through a thickness of the hardmask and the first dielectric layer stack to form a trench opening etching pattern overlying and encompassing the via opening while leaving the via opening sealed; and, etching through a thickness portion of the at least one dielectric insulating layer to form a dual damascene opening.

    摘要翻译: 一种用于形成双镶嵌开口以保护低K介电绝缘层的方法,包括提供半导体工艺晶片,其包括通过至少一个介电绝缘层的厚度部分延伸的通孔; 在所述至少一个电介质绝缘体上沉积包括至少一个介电绝缘层的第一介电层堆叠层,以密封所述通孔开口; 包覆沉积包括至少一个电介质层的第二介电层堆叠,以在第一介电层堆叠之上形成硬掩模,并与第一介电层堆叠接触; 通过硬掩模和第一介电层堆叠的厚度进行光刻图案化和蚀刻,以形成覆盖并包围通孔孔的沟槽开口蚀刻图案,同时使通孔开口密封; 并且蚀刻穿过所述至少一个介电绝缘层的厚度部分以形成双镶嵌开口。