Wafer Bonding Edge Protection Using Double Patterning With Edge Exposure
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    发明申请
    Wafer Bonding Edge Protection Using Double Patterning With Edge Exposure 有权
    晶圆接合边缘保护采用双重图案边缘曝光

    公开(公告)号:US20170053891A1

    公开(公告)日:2017-02-23

    申请号:US14827789

    申请日:2015-08-17

    发明人: Joshua M. Rubin

    摘要: Wafer bonding edge protection techniques are provided. In one aspect, a method of forming Cu interconnects in a wafer includes: forming a dielectric layer on the wafer; forming a first mask on the dielectric layer; patterning the first mask with a footprint/location of the Cu interconnects, wherein the patterning of the first mask is performed over an entire surface of the wafer; forming a second mask on the first mask, wherein the second mask covers a portion of the patterned first mask at an edge region of the wafer; patterning trenches in the dielectric layer through the first mask and the second mask, wherein the second mask blocks formation of the trenches at the edge region of the wafer and thereby provides edge protection during patterning of the trenches; and forming the Cu interconnects in the trenches. A wafer bonding method and interconnect structure are also provided.

    摘要翻译: 提供了晶片焊接边缘保护技术。 一方面,在晶片中形成Cu互连的方法包括:在晶片上形成电介质层; 在介电层上形成第一掩模; 用Cu互连的覆盖区/位置图案化第一掩模,其中在晶片的整个表面上执行第一掩模的图案化; 在所述第一掩模上形成第二掩模,其中所述第二掩模在所述晶片的边缘区域覆盖所述图案化的第一掩模的一部分; 通过第一掩模和第二掩模对介电层中的沟槽进行图案化,其中第二掩模阻挡在晶片的边缘区域形成沟槽,从而在图案化沟槽期间提供边缘保护; 并在沟槽中形成Cu互连。 还提供了晶片接合方法和互连结构。