DEEP TRENCH ISOLATION STRUCTURES FOR A SINGLE-PHOTON AVALANCHE DIODE

    公开(公告)号:US20250142984A1

    公开(公告)日:2025-05-01

    申请号:US18384948

    申请日:2023-10-30

    Abstract: Structures for a single-photon avalanche diode and methods of forming a structure for a single-photon avalanche diode. The structure comprises a semiconductor layer on a top surface of a semiconductor substrate, a light-absorbing layer on a first portion of the semiconductor layer, a dielectric layer on a second portion of the semiconductor layer, and a doped region in the semiconductor substrate adjacent to the semiconductor layer. The structure further comprises a deep trench isolation structure that penetrates through the dielectric layer and the second portion of the semiconductor layer to the doped region. The deep trench isolation structure includes a conductor layer and a dielectric liner, the dielectric liner includes a portion between the conductor layer and the semiconductor layer, and the conductor layer is connected to the first doped region.

    SINGLE-PHOTON AVALANCHE DIODES WITH HYBRID TRENCH ISOLATION STRUCTURES

    公开(公告)号:US20250142983A1

    公开(公告)日:2025-05-01

    申请号:US18384915

    申请日:2023-10-30

    Abstract: Structures for a single-photon avalanche diode and methods of forming a structure for a single-photon avalanche diode. The structure comprises a semiconductor layer on a semiconductor substrate, a cathode comprising a first doped region in the semiconductor substrate, and an anode comprising a second doped region adjacent to a top surface of the semiconductor layer. The structure further comprises a first trench isolation structure including a first conductor layer extending from the top surface of the semiconductor layer through the semiconductor layer to the first doped region. The first conductor layer of the first trench isolation structure is connected to the first doped region. The structure further comprises a second trench isolation structure adjacent to the first trench isolation structure. The second trench isolation structure includes a second conductor layer extending from the top surface of the semiconductor layer fully through the first doped region.

    Single-photon avalanche diodes with deep trench isolation

    公开(公告)号:US12183754B2

    公开(公告)日:2024-12-31

    申请号:US17410025

    申请日:2021-08-24

    Abstract: Structures for a single-photon avalanche diode and methods of forming a structure for a single-photon avalanche diode. The structure includes a semiconductor layer having a first well and a second well defining a p-n junction with the first well, and an interlayer dielectric layer on the semiconductor layer. A deep trench isolation region includes a conductor layer and a dielectric liner. The conductor layer penetrates through the semiconductor layer and the interlayer dielectric layer. The conductor layer has a first end, a second end, and a sidewall that connects the first end to the second end. The dielectric liner is arranged to surround the sidewall of the conductor layer. A metal feature is connected to the first end of the conductor layer.

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