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    • 61. 发明授权
    • Dual damascene process for carbon-based low-K materials
    • 用于碳基低K材料的双镶嵌工艺
    • US06211061B1
    • 2001-04-03
    • US09431536
    • 1999-10-29
    • Chao-Cheng ChenMing-Huei LuiJen-Cheng LiuLi-chih ChaoChia-Shiung Tsai
    • Chao-Cheng ChenMing-Huei LuiJen-Cheng LiuLi-chih ChaoChia-Shiung Tsai
    • H01L214763
    • H01L21/76808
    • A method for forming a dual damascene structure in a carbon-based, low-K material. The process begins by providing a semiconductor structure having a first metal pattern thereover, wherein the first metal pattern has a first barrier layer thereon. An organic dielectric layer is formed on the first barrier layer, and a hard mask layer is formed on the dielectric layer. The hard mask layer and the dielectric layer are patterned to form a trench. A second barrier layer is formed over the hard mask layer and on the bottom and sidewalls of the trench. A barc layer is formed over the second barrier layer, thereby filling the trench. The barc layer, the second barrier layer, and the dielectric layer are patterned to form a via opening, preferably using a photoresist mask. The barc layer is patterned without faceting the edges of the via opening due to the second barrier layer. The barc layer and the etch mask are removed by the dielectric layer etch. The first barrier layer and the second barrier layer are removed. A third barrier layer is formed on the bottom and sidewalls of the trench, on the sidewalls of the via opening, and on the first metal pattern through the via opening. The trench and the via opening are filled with metal to form a damascene structure.
    • 一种在碳基低K材料中形成双镶嵌结构的方法。 该过程开始于提供其上具有第一金属图案的半导体结构,其中第一金属图案在其上具有第一阻挡层。 在第一阻挡层上形成有机电介质层,在电介质层上形成硬掩模层。 图案化硬掩模层和电介质层以形成沟槽。 第二阻挡层形成在硬掩模层之上以及沟槽的底部和侧壁上。 在第二阻挡层上形成棒状层,由此填充沟槽。 将棒状层,第二阻挡层和电介质层图案化以形成通孔,优选使用光致抗蚀剂掩模。 由于第二阻挡层,棒状层被图案化而不使通孔开口的边缘刻划。 通过电介质层蚀刻去除棒状层和蚀刻掩模。 去除第一阻挡层和第二阻挡层。 第三阻挡层形成在沟槽的底部和侧壁上,通孔开口的侧壁上,通过通孔开口形成在第一金属图案上。 沟槽和通孔开口用金属填充以形成镶嵌结构。