Transistor having replacement gate and epitaxially grown replacement channel region
    12.
    发明授权
    Transistor having replacement gate and epitaxially grown replacement channel region 有权
    晶体管具有替代栅极和外延生长的替换沟道区域

    公开(公告)号:US09236445B2

    公开(公告)日:2016-01-12

    申请号:US14156505

    申请日:2014-01-16

    Abstract: The disclosure provides a method of forming a transistor. In this method, a dummy gate structure is formed over a semiconductor substrate. Source/drain regions are then formed in the semiconductor substrate such that a channel region, which is arranged under the dummy gate structure in the semiconductor substrate, separates the source/drains from one another. After the source/drain regions have been formed, the dummy gate structure is removed. After the dummy gate structure has been removed, a surface region of the channel region is removed to form a channel region recess. A replacement channel region is then epitaxially grown in the channel region recess.

    Abstract translation: 本公开提供了一种形成晶体管的方法。 在该方法中,在半导体衬底上形成虚拟栅极结构。 然后在半导体衬底中形成源极/漏极区,使得布置在半导体衬底中的伪栅极结构下方的沟道区彼此分离源极/漏极。 在形成源极/漏极区之后,去除伪栅极结构。 在虚拟栅极结构被去除之后,去除沟道区域的表面区域以形成沟道区域凹陷。 然后在沟道区域凹陷中外延生长替换沟道区。

    Source/drain features with improved strain properties

    公开(公告)号:US12237414B2

    公开(公告)日:2025-02-25

    申请号:US17314815

    申请日:2021-05-07

    Abstract: A method includes receiving a semiconductor substrate. The semiconductor substrate has a top surface and includes a semiconductor element. Moreover, the semiconductor substrate has a fin structure formed thereon. The method also includes recessing the fin structure to form source/drain trenches, forming a first dielectric layer over the recessed fin structure in the source/drain trenches, implanting a dopant element into a portion of the fin structure beneath a bottom surface of the source/drain trenches to form an amorphous semiconductor layer, forming a second dielectric layer over the recessed fin structure in the source/drain trenches, annealing the semiconductor substrate, and removing the first and second dielectric layers. After the annealing and the removing steps, the method further includes further recessing the recessed fin structure to provide a top surface. Additionally, the method includes forming an epitaxial layer from and on the top surface.

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