NOVEL GATE STRUCTURES FOR TUNING THRESHOLD VOLTAGE

    公开(公告)号:US20220336291A1

    公开(公告)日:2022-10-20

    申请号:US17810799

    申请日:2022-07-05

    Abstract: A semiconductor device includes a first gate structure that includes a first interfacial layer, a first gate dielectric layer disposed over the first interfacial layer, and a first gate electrode disposed over the first gate dielectric layer. The semiconductor device also includes a second gate structure that includes a second interfacial layer, a second gate dielectric layer disposed over the second interfacial layer, and a second gate electrode disposed over the second gate dielectric layer. The first interfacial layer contains a different amount of a dipole material than the second interfacial layer.

    Gate structures for semiconductor devices

    公开(公告)号:US11374090B2

    公开(公告)日:2022-06-28

    申请号:US16835916

    申请日:2020-03-31

    Abstract: A semiconductor device with different gate structure configurations and a method of fabricating the same are disclosed. The semiconductor device includes first and second pair of source/drain regions disposed on a substrate, first and second nanostructured channel regions, and first and second gate structures with effective work function values different from each other. The first and second gate structures include first and second high-K gate dielectric layers, first and second barrier metal layers with thicknesses different from each, first and second work function metal (WFM) oxide layers with thicknesses substantially equal to each other disposed on the first and second barrier metal layers, respectively, a first dipole layer disposed between the first WFM oxide layer and the first barrier metal layer, and a second dipole layer disposed between the second WFM oxide layer and the second barrier metal layer.

    Threshold voltage tuning for fin-based integrated circuit device

    公开(公告)号:US11322410B2

    公开(公告)日:2022-05-03

    申请号:US16199498

    申请日:2018-11-26

    Abstract: Methods for tuning threshold voltages of fin-like field effect transistor (FinFET) devices are disclosed herein. An exemplary integrated circuit device includes a high voltage n-type FinFET, a high voltage p-type FinFET, a low voltage n-type FinFET, and a low voltage p-type FinFET. Threshold voltages of the high voltage n-type FinFET and the high voltage p-type FinFET are greater than threshold voltages of the low voltage n-type FinFET and the low voltage p-type FinFET, respectively. The high voltage n-type FinFET, the high voltage p-type FinFET, the low voltage n-type FinFET, and the low voltage p-type FinFET each include a threshold voltage tuning layer that includes tantalum and nitrogen. Thicknesses of the threshold voltage tuning layer of the low voltage n-type FinFET and the low voltage p-type FinFET are less than thicknesses of the threshold voltage tuning layer of the high voltage n-type FinFET and the high voltage p-type FinFET, respectively.

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