Reducing Pattern Loading in the Etch-Back of Metal Gate

    公开(公告)号:US20200020785A1

    公开(公告)日:2020-01-16

    申请号:US16035844

    申请日:2018-07-16

    摘要: A method includes removing a dummy gate to leave a trench between gate spacers, forming a gate dielectric extending into the trench, depositing a metal layer over the gate dielectric, with the metal layer including a portion extending into the trench, depositing a filling region into the trench, with the metal layer have a first and a second vertical portion on opposite sides of the filling region, etching back the metal layer, with the filling region at least recessed less than the metal layer, and remaining parts of the portion of the metal layer forming a gate electrode, depositing a dielectric material into the trench, and performing a planarization to remove excess portions of the dielectric material. A portion of the dielectric material in the trench forms at least a portion of a dielectric hard mask over the gate electrode.

    Reducing pattern loading in the etch-back of metal gate

    公开(公告)号:US10998421B2

    公开(公告)日:2021-05-04

    申请号:US16035844

    申请日:2018-07-16

    摘要: A method includes removing a dummy gate to leave a trench between gate spacers, forming a gate dielectric extending into the trench, depositing a metal layer over the gate dielectric, with the metal layer including a portion extending into the trench, depositing a filling region into the trench, with the metal layer have a first and a second vertical portion on opposite sides of the filling region, etching back the metal layer, with the filling region at least recessed less than the metal layer, and remaining parts of the portion of the metal layer forming a gate electrode, depositing a dielectric material into the trench, and performing a planarization to remove excess portions of the dielectric material. A portion of the dielectric material in the trench forms at least a portion of a dielectric hard mask over the gate electrode.

    Via in semiconductor device structure

    公开(公告)号:US11581222B2

    公开(公告)日:2023-02-14

    申请号:US17018356

    申请日:2020-09-11

    摘要: A semiconductor device structure is provided. The semiconductor device structure includes a gate stack and a source/drain contact structure formed over a substrate. A first gate spacer is separated the gate stack from the source/drain contact structure and extends above top surfaces of the gate stack and the source/drain contact structure. An insulating capping layer covers the top surface of the gate stack and extends on the top surface of the first gate spacer. A conductive via structure partially covers the top surface of the insulating capping layer and the top surface of the source/drain contact structure. A first insulating layer surrounds the conductive via structure and partially covers the top surface of the source/drain contact structure.