METHOD FOR DICING A SEMICONDUCTOR WAFER
    5.
    发明公开

    公开(公告)号:US20240321639A1

    公开(公告)日:2024-09-26

    申请号:US18602230

    申请日:2024-03-12

    摘要: A wafer includes a semiconductor substrate, an interconnection network provided with metal layers and at least one ultra-low dielectric constant dielectric layer, at least one contact region and at least one dicing region. A hard mask is formed having a pattern that defines a dicing line. The formation of the hard mask includes a first etching of an opening in the dicing region to expose the semiconductor substrate in the dicing region, a second etching of an opening in the contact region to expose a surface of a metal contact in the contact region, and a chemical treatment for cleaning the uncovered surface of the metal contact. A vertical dielectric layer is deposited to cover edges of the opening defining the dicing line. This layer is deposited before the chemical treatment is performed.