Semiconductor device including image sensor and method of forming the same

    公开(公告)号:US12278250B2

    公开(公告)日:2025-04-15

    申请号:US17321909

    申请日:2021-05-17

    Abstract: A semiconductor device includes a substrate having a front side and a back side opposite to each other. A plurality of photodetectors is disposed in the substrate within a pixel region. An isolation structure is disposed within the pixel region and between the photodetectors. The isolation structure includes a back side isolation structure extending from the back side of the substrate to a position in the substrate. A conductive plug structure is disposed in the substrate within a periphery region. A conductive cap is disposed on the back side of the substrate and extends from the pixel region to the periphery region and electrically connects the back side isolation structure to the conductive plug structure. A conductive contact lands on the conductive plug structure, and is electrically connected to the back side isolation structure through the conductive plug structure and the conductive cap.

    Image sensor device
    106.
    发明授权

    公开(公告)号:US11502121B2

    公开(公告)日:2022-11-15

    申请号:US16909024

    申请日:2020-06-23

    Abstract: The present disclosure relates to a semiconductor device. The semiconductor device includes a gate structure arranged on a first surface of a substrate. A doped isolation region is arranged within the substrate along opposing sides of the gate structure. The substrate includes a first region between sides of the doped isolation region and a second region having a different doping characteristic than the first region. The second region contacts a bottom of the first region and a bottom of the doped isolation region.

    Image sensor with overlap of backside trench isolation structure and vertical transfer gate

    公开(公告)号:US11437420B2

    公开(公告)日:2022-09-06

    申请号:US16733433

    申请日:2020-01-03

    Abstract: Some embodiments are directed towards an image sensor device. A photodetector is disposed in a semiconductor substrate, and a transfer transistor is disposed over photodetector. The transfer transistor includes a transfer gate having a lateral portion extending over a frontside of the semiconductor substrate and a vertical portion extending to a first depth below the frontside of the semiconductor substrate. A gate dielectric separates the lateral portion and the vertical portion from the semiconductor substrate. A backside trench isolation structure extends from a backside of the semiconductor substrate to a second depth below the frontside of the semiconductor substrate. The backside trench isolation structure laterally surrounds the photodetector, and the second depth is less than the first depth such that a lowermost portion of the vertical portion of the transfer transistor has a vertical overlap with an uppermost portion of the backside trench isolation structure.

    THROUGH-SUBSTRATE-VIA WITH REENTRANT PROFILE

    公开(公告)号:US20220084908A1

    公开(公告)日:2022-03-17

    申请号:US17177660

    申请日:2021-02-17

    Abstract: The present disclosure relates an integrated chip. The integrated chip includes a semiconductor device arranged along a first side of a semiconductor substrate. The semiconductor substrate has one or more sidewalls extending from the first side of the semiconductor substrate to an opposing second side of the semiconductor substrate. A dielectric liner lines the one or more sidewalls of the semiconductor substrate. A through-substrate-via (TSV) is arranged between the one or more sidewalls and is separated from the semiconductor substrate by the dielectric liner. The TSV has a first width at a first distance from the second side and a second width at a second distance from the second side. The first width is smaller than the second width and the first distance is smaller than the second distance

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