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    • 5. 发明授权
    • Dual damascene process with no passing metal features
    • 双镶嵌工艺,没有通过金属特征
    • US06989602B1
    • 2006-01-24
    • US09667046
    • 2000-09-21
    • Steven A. Lytle
    • Steven A. Lytle
    • H01L23/48H01L23/52
    • H01L23/5226H01L21/76802H01L21/76808H01L2924/0002H01L2924/00
    • The present invention provides a method of forming integrated circuit interconnect structures wherein a passing metal feature does not include a landing pad. In an exemplary embodiment, the method includes forming a via opening through first and second dielectric layers, such as silicon dioxide layer, located over a conductive layer, such as copper, and to a first etch stop layer, such as silicon nitride, located over the conductive layer. A trench opening is then formed through the second dielectric layer and to a second etch stop layer. Once the via and trench openings are formed, an etch is conducted that etches through the first etch stop layer such that the opening contacts the underlying conductive layer.
    • 本发明提供一种形成集成电路互连结构的方法,其中通过的金属特征不包括着陆焊盘。 在一个示例性实施例中,该方法包括通过位于诸如铜的导电层之上的第一和第二电介质层(例如二氧化硅层)形成通孔,以及位于上方的第一蚀刻停止层(例如氮化硅) 导电层。 然后通过第二介电层和第二蚀刻停止层形成沟槽开口。 一旦形成通孔和沟槽开口,就进行蚀刻通过第一蚀刻停止层的蚀刻,使得开口接触下面的导电层。