Preventing dielectric void over trench isolation region

    公开(公告)号:US11171036B2

    公开(公告)日:2021-11-09

    申请号:US16596814

    申请日:2019-10-09

    Abstract: A method and related structure provide a void-free dielectric over trench isolation region in an FDSOI substrate. The structure may include a first transistor including a first active gate over the substrate, a second transistor including a second active gate over the substrate, a first liner extending over the first transistor, and a second, different liner extending over the second transistor. A trench isolation region electrically isolates the first transistor from the second transistor. The trench isolation region includes a trench isolation extending into the FDSOI substrate and an inactive gate over the trench isolation. A dielectric extends over the inactive gate and in direct contact with an upper surface of the trench isolation region. The dielectric is void-free, and the liners do not extend over the trench isolation.

    PREVENTING DIELECTRIC VOID OVER TRENCH ISOLATION REGION

    公开(公告)号:US20210111065A1

    公开(公告)日:2021-04-15

    申请号:US16596814

    申请日:2019-10-09

    Abstract: A method and related structure provide a void-free dielectric over trench isolation region in an FDSOI substrate. The structure may include a first transistor including a first active gate over the substrate, a second transistor including a second active gate over the substrate, a first liner extending over the first transistor, and a second, different liner extending over the second transistor. A trench isolation region electrically isolates the first transistor from the second transistor. The trench isolation region includes a trench isolation extending into the FDSOI substrate and an inactive gate over the trench isolation. A dielectric extends over the inactive gate and in direct contact with an upper surface of the trench isolation region. The dielectric is void-free, and the liners do not extend over the trench isolation.

    Methods of forming an IC product comprising transistor devices with different threshold voltage levels

    公开(公告)号:US11315835B2

    公开(公告)日:2022-04-26

    申请号:US16296469

    申请日:2019-03-08

    Abstract: One illustrative method disclosed herein includes forming a conformal SMCM layer above a conformal high-k gate insulation layer within each of first and second replacement gate cavities (RGC), removing the SMCM layer from the first RGC while leaving the SMCM layer in position within the second RGC, forming a first conformal metal-containing material (MCM) layer above the gate insulation layer within the first RGC and above the SMCM layer in position within the second RGC, removing the first conformal MCM layer and the conformal SMCM layer positioned within the second RGC while leaving the first conformal MCM layer within the first RGC, and forming a second conformal MCM layer above the first conformal MCM layer positioned within the first RGC and above the gate insulation layer positioned within the second RGC.

    Mask-free methods of forming structures in a semiconductor device

    公开(公告)号:US11004953B2

    公开(公告)日:2021-05-11

    申请号:US16454016

    申请日:2019-06-26

    Abstract: A method is provided for fabricating a semiconductor device structure with a short channel and long channel component having different gate dielectric layers without using lithography processes or masks. The method includes forming first and second openings having sidewalls and bottom surfaces in a dielectric layer, the first opening being narrower than the second opening. A first material layer is formed in the first and second openings. A protective layer is formed over the first material layer, wherein the protective layer covers the sidewalls and the bottom surface of the second opening. A block layer is formed to fill the second opening and cover the protective layer therein. The method further includes removing side portions of the protective layer to expose upper portions of the first material layer in the second opening. The block layer is removed from the second opening to expose the protective layer remaining in the second opening. A second material layer is formed over the first material layer on the exposed upper portions of the first material layer in the second opening. An intermix layer is formed in the second opening using the first and second material layers. The protective layer from the second opening is removed to expose the first material layer.

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