Bonding Structures of Integrated Circuit Devices and Method Forming the Same

    公开(公告)号:US20220238466A1

    公开(公告)日:2022-07-28

    申请号:US17186742

    申请日:2021-02-26

    IPC分类号: H01L23/00

    摘要: A method includes forming a conductive pad over an interconnect structure of a wafer, forming a capping layer over the conductive pad, forming a dielectric layer covering the capping layer, and etching the dielectric layer to form an opening in the dielectric layer. The capping layer is exposed to the opening. A wet-cleaning process is then performed on the wafer. During the wet-cleaning process, a top surface of the capping layer is exposed to a chemical solution used for performing the wet-cleaning process. The method further includes depositing a conductive diffusion barrier extending into the opening, and depositing a conductive material over the conductive diffusion barrier.