METHOD FOR FABRICATING SEMICONDUCTOR DEVICE
    5.
    发明申请

    公开(公告)号:US20190019731A1

    公开(公告)日:2019-01-17

    申请号:US15647031

    申请日:2017-07-11

    Abstract: A method for fabricating a semiconductor structure includes forming a plurality of mandrels over a substrate, wherein the substrate comprises a semiconductor substrate as a base. Then, a first dielectric layer is formed to cover on a predetermined mandrel of the mandrels. A second dielectric layer is formed over the substrate to cover the mandrels. The mandrels are removed, wherein a remaining portion of the first dielectric layer and the second dielectric layer at a sidewall of the mandrels remains on the substrate. An anisotropic etching process is performed over the substrate until a top portion of the semiconductor substrate is etched to form a plurality of fins corresponding to the remaining portion of the first dielectric layer and the second dielectric layer.

    Method for fabricating semiconductor device

    公开(公告)号:US10032675B2

    公开(公告)日:2018-07-24

    申请号:US15473614

    申请日:2017-03-30

    Abstract: The present invention further provides a method for forming a semiconductor device, comprising: first, a substrate having a fin structure disposed thereon is provided, wherein the fin structure has a trench, next, a first liner in the trench is formed, a first insulating layer is formed on the first liner, afterwards, a shallow trench isolation is formed in the substrate and surrounding the fin structure, wherein a bottom surface of the shallow trench isolation is higher than a bottom surface of the first insulating layer, and a top surface of the shallow trench isolation is lower than a top surface of the first insulating layer, and a dummy gate structure is formed on the first insulating layer and disposed above the trench, wherein a bottom surface of the dummy gate structure and a top surface of the fin structure are on a same level.

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