Semiconductor-on-insulator transistor having a doping profile for
fully-depleted operation
    1.
    发明授权
    Semiconductor-on-insulator transistor having a doping profile for fully-depleted operation 失效
    具有用于完全耗尽操作的掺杂分布的绝缘体上半导体晶体管

    公开(公告)号:US5656844A

    公开(公告)日:1997-08-12

    申请号:US507898

    申请日:1995-07-27

    摘要: A semiconductor-on-insulator transistor (10) has a channel region (30) in a semiconductor film (16) under a gate insulating layer (26). The channel region has a top dopant concentration N.sub.T at a top surface (32) of the film that is significantly greater than a bottom dopant concentration N.sub.B at a bottom surface (34) of the film. This non-uniform doping profile provides an SOI device that operates in a fully-depleted mode, yet permits thicker films without a significant degradation of sub-threshold slope.

    摘要翻译: 绝缘体上半导体晶体管(10)在栅极绝缘层(26)下方的半导体膜(16)中具有沟道区(30)。 沟道区在薄膜的顶表面(32)处具有明显大于薄膜底表面(34)处的底部掺杂剂浓度NB的顶部掺杂剂浓度NT。 这种非均匀掺杂分布提供了以完全耗尽模式工作的SOI器件,但允许较厚的膜,而不会明显降低子阈值斜率。

    Method for fabricating insulated gate field effect transistor having
subthreshold swing
    2.
    发明授权
    Method for fabricating insulated gate field effect transistor having subthreshold swing 失效
    具有亚阈值摆幅的绝缘栅场效应晶体管的制造方法

    公开(公告)号:US5482878A

    公开(公告)日:1996-01-09

    申请号:US223393

    申请日:1994-04-04

    摘要: Insulated gate field effect transistors (10, 70) having process steps for setting the V.sub.T and a device leakage current which are decoupled from the process steps for providing punchthrough protection, thereby lowering a subthreshold swing. In a unilateral transistor (10), a portion (37, 45) of a dopant layer (25, 30) between a source region (48, 51) and a drain region (49, 52) serves as a channel region and sets the V.sub.T and the device leakage current. A halo region (34, 39) contains the source region (48, 51) and sets the punchthrough voltage. In a bilateral transistor (70), both a source region (83, 86) and a drain region (84, 87) are contained within halo regions (75, 74, 79, 81). A portion (76, 82) of a dopant layer (25, 30) sets the V.sub.T and a leakage current, whereas the halo region (75, 79) sets the punchthrough voltage.

    摘要翻译: 绝缘栅场效应晶体管(10,70)具有用于设置VT和器件漏电流的工艺步骤,所述工艺步骤与用于提供穿透保护的工艺步骤分离,从而降低亚阈值摆幅。 在单侧晶体管(10)中,源极区(48,51)和漏极区(49,52)之间的掺杂剂层(25,30)的部分(37,45)用作沟道区域,并将 VT和器件漏电流。 光晕区域(34,39)包含源极区域(48,51)并设置穿透电压。 在双向晶体管(70)中,源极区域(83,86)和漏极区域(84,87)都包含在光晕区域(75,74,79,81)内。 掺杂剂层(25,30)的一部分(76,82)设定VT和漏电流,而光晕区域(75,79)设定穿透电压。