Semiconductor device and method for manufacturing the same

    公开(公告)号:US10403646B2

    公开(公告)日:2019-09-03

    申请号:US15041502

    申请日:2016-02-11

    摘要: A semiconductor device with reduced parasitic capacitance is provided. The semiconductor device includes a first insulating layer; a first oxide layer over the first insulating layer; a semiconductor layer over the first oxide layer; a source electrode layer and a drain electrode layer over the semiconductor layer; a second insulating layer over the first insulating layer; a third insulating layer over the second insulating layer, the source electrode layer, and the drain electrode layer; a second oxide layer over the semiconductor layer; a gate insulating layer over the second oxide layer; a gate electrode layer over the gate insulating layer; and a fourth insulating layer over the third insulating layer, the second oxide layer, the gate insulating layer, and the gate electrode layer.

    STI INNER SPACER TO MITIGATE SDB LOADING
    66.
    发明申请

    公开(公告)号:US20190035633A1

    公开(公告)日:2019-01-31

    申请号:US15665183

    申请日:2017-07-31

    摘要: A shallow trench isolation (STI) structure is formed from a conventional STI trench structure formed of first dielectric material extending into the substrate. The conventional STI structure undergoes further processing, including removing a first portion of the dielectric material and adjacent portions of the semiconductor substrate to create a first recess, and then removing another portion of the dielectric material to create a second recess in just the dielectric material. A nitride layer is formed above remaining dielectric material and on the sidewalls of the substrate. A second dielectric material is formed on the spacer layer and fills the remainder of first and second recesses. The nitride layer provides an “inner spacer” between the first insulating material and the second insulating material and also separates the substrate from the second insulating material. An isotropic Fin reveal process is performed and the STI structure assists in equalizing fin heights and increasing active S/D region area/volume.