Thin film transistors for memory cell array layer selection

    公开(公告)号:US11017843B2

    公开(公告)日:2021-05-25

    申请号:US16457617

    申请日:2019-06-28

    申请人: Intel Corporation

    摘要: In memory devices where a memory cell includes a thin film cell select transistor, selection between layers of such memory cells may further comprise another thin film select transistor. Bitline and wordline encoding suitable for a memory device having a single layer of memory cells may be scaled up to a 3D memory device having two or more memory cell layers. In a DRAM device one layer of (1TFT-1C) cells may include a 2D array of metal-insulator-metal capacitors over an array of TFTs. Additional layers of such 1TFT-1C cells may be stacked monolithically to form a 3D array. Memory cells in each layer may be accessed through a wordline and local bitline. A local bitline of one cell layer may be coupled to global bitline applicable to all cell layers through a layer-selected TFT according to a voltage applied to a layer-select gate voltage.

    VERTICAL TUNNELING FIELD-EFFECT TRANSISTORS
    7.
    发明申请

    公开(公告)号:US20200335610A1

    公开(公告)日:2020-10-22

    申请号:US16957667

    申请日:2018-02-28

    申请人: Intel Corporation

    摘要: Tunneling Field Effect Transistors (TFETs) are promising devices in that they promise significant performance increase and energy consumption decrease due to a steeper subthreshold slope (for example, smaller sub-threshold swing). In various embodiments, vertical fin-based TFETs can be fabricated in trenches, for example, silicon trenches. In another embodiment, vertical TFETs can be used on different material systems acting as a substrate and/or trenches (for example, Si, Ge, III-V semiconductors, GaN, and the like). In one embodiment, the tunneling direction in the channel of the vertical TFET can be perpendicular to the Si substrates. In one embodiment, this can be different than the tunneling direction in the channel of lateral TFETs.

    TRANSISTOR DEVICE WITH VARIOUSLY CONFORMAL GATE DIELECTRIC LAYERS

    公开(公告)号:US20200312976A1

    公开(公告)日:2020-10-01

    申请号:US16363632

    申请日:2019-03-25

    申请人: Intel Corporation

    摘要: Techniques and mechanisms to provide electrical insulation between a gate and a channel region of a non-planar circuit device. In an embodiment, the gate structure, and insulation spacers at opposite respective sides of the gate structure, each extend over a semiconductor fin structure. In a region between the insulation spacers, a first dielectric layer extends conformally over the fin, and a second dielectric layer adjoins and extends conformally over the first dielectric layer. A third dielectric layer, adjoining the second dielectric layer and the insulation spacers, extends under the gate structure. Of the first, second and third dielectric layers, the third dielectric layer is conformal to respective sidewalls of the insulation spacers. In another embodiment, the second dielectric layer is of dielectric constant which is greater than that of the first dielectric layer, and equal to or less than that of the third dielectric layer.