METHOD FOR FABRICATING A TRANSISTOR WITH A RAISED SOURCE-DRAIN STRUCTURE
    7.
    发明申请
    METHOD FOR FABRICATING A TRANSISTOR WITH A RAISED SOURCE-DRAIN STRUCTURE 审中-公开
    用于制造具有提高的源 - 排水结构的晶体管的方法

    公开(公告)号:US20160181382A1

    公开(公告)日:2016-06-23

    申请号:US14577656

    申请日:2014-12-19

    Abstract: A method for forming a transistor includes defining agate structure on a top surface of a first semiconductor layer of a silicon-on-insulator (SOI) substrate. The gate structure includes an insulating cover. A second semiconductor layer is then conformally deposited. The deposited second semiconductor layer includes an epitaxial portion on surfaces of the first semiconductor layer and an amorphous portion on surfaces of the insulating cover. The amorphous portion is then removed using a selective etch. The remaining epitaxial portion forms faceted raised source-drain structures on either side of the transistor gate structure. A slope of the sloped surface for the facet is dependent on the process parameters used during the conformal deposition.

    Abstract translation: 一种用于形成晶体管的方法包括在绝缘体上硅(SOI)衬底的第一半导体层的顶表面上限定玛瑙结构。 门结构包括绝缘盖。 然后共形沉积第二半导体层。 沉积的第二半导体层包括在第一半导体层的表面上的外延部分和绝缘盖表面上的非晶部分。 然后使用选择性蚀刻除去非晶部分。 剩余的外延部分在晶体管栅极结构的任一侧上形成刻面凸起的源极 - 漏极结构。 用于小平面的倾斜表面的斜率取决于在保形沉积期间使用的工艺参数。

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