Semiconductor device and manufacturing method thereof

    公开(公告)号:US10672870B2

    公开(公告)日:2020-06-02

    申请号:US16036302

    申请日:2018-07-16

    Abstract: In a method of manufacturing a semiconductor device, a fin structure is formed over a substrate. The fin structure has a channel region and a source/drain region. A gate structure is formed over the channel region of the fin structure. A first source/drain etching is performed to recess the source/drain region of the fin structure. After the first source/drain etching, a second source/drain etching is performed to further recess the source/drain region of the fin structure. After the second source/drain etching, a third source/drain etching is performed to further recess the source/drain region of the fin structure, thereby forming a source/drain recess. One or more epitaxial layers are formed in the source/drain recess. The first source/drain etching is isotropic etching and the second source/drain etching is anisotropic etching.

    Stress Compensation Layer to Improve Device Uniformity
    19.
    发明申请
    Stress Compensation Layer to Improve Device Uniformity 有权
    应力补偿层来提高设备的均匀性

    公开(公告)号:US20140353833A1

    公开(公告)日:2014-12-04

    申请号:US13905438

    申请日:2013-05-30

    Abstract: The present disclosure relates to an integrated chip having one or more back-end-of-the-line (BEOL) stress compensation layers that reduce stress on one or more underlying semiconductor devices, and an associated method of formation. In some embodiments, the integrated chip has a semiconductor substrate with one or more semiconductor devices. A stressed element is located within a back-end-of-the-line stack at a position overlying the one or more semiconductor devices. A stressing layer is located over the stressed element induces a stress upon the stressed element. A stress compensation layer, located over the stressed element, provides a counter-stress to reduce the stress induced on the stressed element by the stressing layer. By reducing the stress induced on the stressed element, stress on the semiconductor substrate is reduced, improving uniformity of performance of the one or more semiconductor devices.

    Abstract translation: 本公开涉及具有一个或多个后端(BEOL)应力补偿层的集成芯片,其减小一个或多个下层半导体器件上的应力,以及相关联的形成方法。 在一些实施例中,集成芯片具有带有一个或多个半导体器件的半导体衬底。 应力元件位于覆盖一个或多个半导体器件的位置处的后端行堆叠中。 应力层位于应力元件上方会对应力元件产生应力。 位于应力元件上方的应力补偿层提供反应力,以减轻应力层对受应力元件的应力。 通过减少在应力元件上产生的应力,减小半导体衬底上的应力,提高一个或多个半导体器件的性能的均匀性。

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