FIELD EFFECT TRANSISTOR (FET) STACK AND METHODS TO FORM SAME

    公开(公告)号:US20210336005A1

    公开(公告)日:2021-10-28

    申请号:US16855236

    申请日:2020-04-22

    Abstract: The disclosure provides a field effect transistor (FET) stack with methods to form the same. The FET stack includes a first transistor over a substrate. The first transistor includes a first active semiconductor material including a first channel region between a first set of source/drain terminals, and a first gate structure over the first channel region. The first gate structure includes a first gate insulator of a first thickness above the first channel region. A second transistor is over the substrate and horizontally separated from the first transistor. A second gate structure of the second transistor may include a second gate insulator of a second thickness above a second channel region, the second thickness being greater than the first thickness. A shared gate node may be coupled to each of the first gate structure and the second gate structure.

    Semiconductor isolation structures comprising shallow trench and deep trench isolation

    公开(公告)号:US11049932B2

    公开(公告)日:2021-06-29

    申请号:US16226640

    申请日:2018-12-20

    Abstract: The present disclosure relates to isolation structures for semiconductor devices and, more particularly, to dual trench isolation structures having a deep trench and a shallow trench for electrically isolating integrated circuit (IC) components formed on a semiconductor substrate. The semiconductor isolation structure of the present disclosure includes a semiconductor substrate, a shallow trench isolation (STI) disposed over the semiconductor substrate, a deep trench isolation (DTI) with sidewalls extending from a bottom surface of the STI and terminating in the semiconductor substrate, a multilayer dielectric lining disposed on the sidewalls of the DTI, the multilayer dielectric lining including an etch stop layer positioned between inner and outer dielectric liners, and a filler material disposed within the DTI.

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