Reduction of boron diffusivity in pfets
    1.
    发明申请
    Reduction of boron diffusivity in pfets 失效
    降低pfets中的硼扩散率

    公开(公告)号:US20070093030A1

    公开(公告)日:2007-04-26

    申请号:US10596249

    申请日:2003-12-08

    摘要: A stressed film applied across a boundary defined by a structure or a body (e.g. substrate or layer) of semiconductor material provides a change from tensile to compressive stress in the semiconductor material proximate to the boundary and is used to modify boron diffusion rate during annealing and thus modify final boron concentrations. In the case of a field effect transistor, the gate structure may be formed with or without sidewalls to regulate the location of the boundary relative to source/drain, extension and/or halo implants. Different boron diffusion rates can be produced in the lateral and vertical directions and diffusion rates comparable to arsenic can be achieved. Reduction of junction capacitance of both nFETs and pFETs can be achieved simultaneously with the same process steps.

    摘要翻译: 应用于由半导体材料的结构或主体(例如衬底或层)限定的边界处的应力膜提供了靠近边界的半导体材料中的拉应力和压缩应力的变化,并用于在退火过程中修饰硼扩散速率, 从而改变最终的硼浓度。 在场效应晶体管的情况下,栅极结构可以形成有或不具有侧壁以调节边界相对于源极/漏极,延伸和/或晕轮植入物的位置。 可以在横向和垂直方向上产生不同的硼扩散速率,并且可以实现与砷相当的扩散速率。 可以通过相同的工艺步骤同时实现nFET和pFET的结电容的减小。