SRAM with stacked bit cells
    31.
    发明授权

    公开(公告)号:US10453522B2

    公开(公告)日:2019-10-22

    申请号:US15487526

    申请日:2017-04-14

    Abstract: Static random access memories (SRAM) are provided. The SRAM includes a plurality of bit cells. Each bit cell includes a first inverter, a second inverter cross-coupled with the first inverter, a first pass gate transistor coupled between the first inverter and a bit line, and a second pass gate transistor coupled between the second inverter and a complementary bit line. The bit cells are divided into a plurality of top tier cells and a plurality of bottom tier cells, and each of the bottom tier cells is disposed under the individual top tier cell. The first inverter of the top tier cell is disposed on the second inverter of the corresponding bottom tier cell within a substrate, and the second inverter of the top tier cell is disposed on the first inverter of the corresponding bottom tier cell within the substrate.

    Method of manufacturing a semiconductor device and a semiconductor device

    公开(公告)号:US10193090B2

    公开(公告)日:2019-01-29

    申请号:US15627722

    申请日:2017-06-20

    Abstract: In a method of manufacturing a gate-all-around field effect transistor, a trench is formed over a substrate. Nano-tube structures are arranged into the trench, each of which includes a carbon nanotube (CNT) having a gate dielectric layer wrapping around the CNT and a gate electrode layer over the gate dielectric layer. An anchor layer is formed in the trench. A part of the anchor layer is removed at a source/drain (S/D) region. The gate electrode layer and the gate dielectric layer are removed at the S/D region, thereby exposing a part of the CNT at the S/D region. An S/D electrode layer is formed on the exposed part of the CNT. A part of the anchor layer is removed at a gate region, thereby exposing a part of the gate electrode layer of the gate structure. A gate contact layer is formed on the exposed part of the gate electrode layer.

    SRAM with stacked bit cells
    35.
    发明授权

    公开(公告)号:US09659632B2

    公开(公告)日:2017-05-23

    申请号:US14918068

    申请日:2015-10-20

    CPC classification number: G11C11/419 G11C11/412 H01L27/11582 H01L28/00

    Abstract: Static random access memories (SRAM) are provided. The SRAM includes a plurality of bit cells. Each bit cell includes a first inverter, a second inverter cross-coupled with the first inverter, a first pass gate transistor coupled between the first inverter and a bit line, and a second pass gate transistor coupled between the second inverter and a complementary bit line. The bit cells are divided into a plurality of top tier cells and a plurality of bottom tier cells, and each of the bottom tier cells is disposed under the individual top tier cell. The first inverter of the top tier cell is disposed on the second inverter of the corresponding bottom tier cell within a substrate, and the second inverter of the top tier cell is disposed on the first inverter of the corresponding bottom tier cell within the substrate.

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