Method to solve via poisoning for porous low-k dielectric
    21.
    发明授权
    Method to solve via poisoning for porous low-k dielectric 失效
    解决多孔低介电常数中毒的方法

    公开(公告)号:US06878615B2

    公开(公告)日:2005-04-12

    申请号:US09863224

    申请日:2001-05-24

    Abstract: A method of forming a via in a low-k dielectric material and without the attendant via poisoning problem, or a dual damascene structure formed in the same dielectric and without the same problem are disclosed. The vertical walls of the via opening are first lined with a low-k protection layer and then covered with a barrier layer in order to prevent outgassing from the low-k dielectric material when copper is deposited into the via opening. In the case of a dual damascene structure, it is sufficient that the hole opening underlying the trench opening is first lined with the low-k protection layer. The resulting via or dual damascene structure is free of poisoned metal and, therefore, more reliable.

    Abstract translation: 公开了一种在低k电介质材料中形成通孔并且不伴随通过中毒问题的方法,或者形成在相同电介质中并且没有相同问题的双镶嵌结构。 通孔开口的垂直壁首先衬有低k保护层,然后被阻挡层覆盖,以便当铜沉积到通孔中时,防止从低k电介质材料脱气。 在双镶嵌结构的情况下,沟槽开口下方的开孔首先衬有低k保护层就足够了。 所得到的通孔或双镶嵌结构没有中毒金属,因此更可靠。

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