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    • 88. 发明授权
    • Method of making a slot via filled dual damascene structure with a middle stop layer
    • 通过具有中间停止层的填充双镶嵌结构制造槽的方法
    • US06444573B1
    • 2002-09-03
    • US09788472
    • 2001-02-21
    • Fei WangLynne A. OkadaRamkumar SubramanianCalvin T. Gabriel
    • Fei WangLynne A. OkadaRamkumar SubramanianCalvin T. Gabriel
    • H01L214763
    • H01L21/76835H01L21/76808Y10S977/888
    • An interconnect structure and method of forming the same in which a first inorganic low k dielectric material is deposited over a conductive layer to form a first dielectric layer. An etch stop layer is formed on the first dielectric layer. The etch stop layer and the first dielectric layer are etched to form a slot via in the first dielectric layer. The slot via is longer than the width of a subsequently formed trench. A second low k dielectric material is deposited within the slot via and over the etch stop layer, to form a second dielectric layer over the slot via and the etch stop layer. The re-filled slot via is simultaneously etched with the second dielectric layer in which a trench is formed. The entire width of the trench is over the via that is etched. The re-opened via and the trench are filled with a conductive material.
    • 一种互连结构及其形成方法,其中第一无机低k电介质材料沉积在导电层上以形成第一介电层。 在第一电介质层上形成蚀刻停止层。 蚀刻停止层和第一介电层被蚀刻以在第一介电层中形成槽通孔。 狭缝通孔比随后形成的沟槽的宽度长。 第二低k电介质材料通过蚀刻停止层上方和上方沉积在槽内,以在槽通孔和蚀刻停止层上形成第二电介质层。 再填充的槽通孔与其中形成沟槽的第二电介质层同时蚀刻。 沟槽的整个宽度在被蚀刻的通孔之上。 重新打开的通孔和沟槽填充有导电材料。