INTEGRATED CIRCUIT STRUCTURES HAVING STACKED TRANSISTORS WITH BACKSIDE ACCESS

    公开(公告)号:US20250107061A1

    公开(公告)日:2025-03-27

    申请号:US18372521

    申请日:2023-09-25

    Abstract: Structures having stacked transistors with backside access are described. In an example, an integrated circuit structure includes a front side structure. The front side structure includes a device layer including first, second, third and fourth stacks of nanowires and corresponding first, second, third and fourth overlying gate lines, and the device layer including first, second, third, fourth and fifth source or drain structures and corresponding overlying trench contacts alternating with the stacks of nanowires and the overlying gate lines, and one or more metallization layers above the device layer. A backside structure includes a backside via connection coupled to a bottom portion of the third source or drain structure, the bottom portion of the third source or drain structure isolated from a top portion of the third source or drain structure.

    STACKED SOURCE-DRAIN-GATE CONNECTION AND PROCESS FOR FORMING SUCH

    公开(公告)号:US20230238436A1

    公开(公告)日:2023-07-27

    申请号:US18130824

    申请日:2023-04-04

    CPC classification number: H01L29/41741 H01L29/41775

    Abstract: A device is disclosed. The device includes a first epitaxial region, a second epitaxial region, a first gate region between the first epitaxial region and a second epitaxial region, a first dielectric structure underneath the first epitaxial region, a second dielectric structure underneath the second epitaxial region, a third epitaxial region underneath the first epitaxial region, a fourth epitaxial region underneath the second epitaxial region, and a second gate region between the third epitaxial region and a fourth epitaxial region and below the first gate region. The device also includes, a conductor via extending from the first epitaxial region, through the first dielectric structure and the third epitaxial region, the conductor via narrower at an end of the conductor via that contacts the first epitaxial region than at an opposite end.

    BACK SIDE PROCESSING OF INTEGRATED CIRCUIT STRUCTURES TO FORM INSULATION STRUCTURE BETWEEN ADJACENT TRANSISTOR STRUCTURES

    公开(公告)号:US20230132053A1

    公开(公告)日:2023-04-27

    申请号:US18087129

    申请日:2022-12-22

    Abstract: Techniques are disclosed for forming integrated circuit structures having a plurality of non-planar transistors. An insulation structure is provided between channel, source, and drain regions of neighboring fins. The insulation structure is formed during back side processing, wherein at least a first portion of the isolation material between adjacent fins is recessed to expose a sub-channel portion of the semiconductor fins. A spacer material is then deposited at least on the exposed opposing sidewalls of the exposed sub-channel portion of each fin. The isolation material is then further recessed to form an air gap between gate, source, and drain regions of neighboring fins. The air gap electrically isolates the source/drain regions of one fin from the source/drain regions of an adjacent fin, and likewise isolates the gate region of the one fin from the gate region of the adjacent fin. The air gap can be filled with a dielectric material.

    MICROELECTRONIC ASSEMBLIES
    19.
    发明申请

    公开(公告)号:US20220254754A1

    公开(公告)日:2022-08-11

    申请号:US17728813

    申请日:2022-04-25

    Abstract: Microelectronic assemblies, and related devices and methods, are disclosed herein. For example, in some embodiments, a microelectronic assembly may include: a first die having a first surface and an opposing second surface, first conductive contacts at the first surface of the first die, and second conductive contacts at the second surface of the first die; and a second die having a first surface and an opposing second surface, and first conductive contacts at the first surface of the second die; wherein the second conductive contacts of the first die are coupled to the first conductive contacts of the second die by interconnects, the second surface of the first die is between the first surface of the first die and the first surface of the second die, and a footprint of the first die is smaller than and contained within a footprint of the second die.

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