公开(公告)号：US06872665B1

公开(公告)日：2005-03-29

申请号：US09599718

申请日：2000-06-22

Applicant: Francis G. Celii ,  Guoqiang Xing ,  Andrew McKerrow ,  Andrew Ralston ,  Zhicheng Tang ,  Kenneth J. Newton ,  Robert Kraft ,  Jeff West

Inventor： Francis G. Celii ,  Guoqiang Xing ,  Andrew McKerrow ,  Andrew Ralston ,  Zhicheng Tang ,  Kenneth J. Newton ,  Robert Kraft ,  Jeff West

IPC: H01L21/768 ,  H01L21/20

CPC classification number: H01L21/76808

Abstract: A dual damascene process flow for forming interconnect lines and vias in which at least part of the via (116) is etched prior to the trench etch. A low-k material such as a thermoset organic polymer is used for the ILD (106) and IMD (110). After the at least partial via etch, a BARC (120) is deposited over the structure including in the via (116). Then, the trench (126) is patterned and etched. Although at least some of the BARC (120) material is removed during the trench etch, the bottom of the via (116) is protected.

Abstract translation: 用于形成互连线和通孔的双镶嵌工艺流程，其中在沟槽蚀刻之前蚀刻至少部分通孔（116）。 使用低k材料如热固性有机聚合物用于ILD（106）和IMD（110）。 在至少部分通孔蚀刻之后，BARC（120）沉积在包括在通孔（116）中的结构上。 然后，对沟槽（126）进行图案化和蚀刻。 虽然在沟槽蚀刻期间去除了至少一些BARC（120）材料，但是通孔（116）的底部被保护。