METHOD FOR FABRICATING JUNCTIONLESS TRANSISTOR
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    发明申请
    METHOD FOR FABRICATING JUNCTIONLESS TRANSISTOR 审中-公开
    用于制造无连接晶体管的方法

    公开(公告)号:US20130078777A1

    公开(公告)日:2013-03-28

    申请号:US13618054

    申请日:2012-09-14

    IPC分类号: H01L21/336

    摘要: A method is provided for fabricating a transistor. According to the method, a doped material layer is formed on a semiconductor layer, and dopant is diffused from the doped material layer into the semiconductor layer to form a graded dopant region in the semiconductor layer. The graded dopant region has a higher doping concentration near a top surface of the semiconductor layer and a lower doping concentration near a bottom surface of the semiconductor layer, with a gradual decrease in the doping concentration. The doped material layer is removed, and then a gate stack is formed on the semiconductor layer. Source and drain regions are formed adjacent to an active area that is in the semiconductor layer underneath the gate stack. The active area comprises at least a portion of the graded dopant region, and the source and drain regions and the active area have the same conductivity type.

    摘要翻译: 提供了一种用于制造晶体管的方法。 根据该方法,在半导体层上形成掺杂材料层,掺杂剂从掺杂材料层扩散到半导体层中,以在半导体层中形成渐变掺杂区域。 渐变掺杂区域在半导体层的顶表面附近具有更高的掺杂浓度,并且在半导体层的底表面附近具有较低的掺杂浓度,掺杂浓度逐渐降低。 去除掺杂材料层,然后在半导体层上形成栅叠层。 源极和漏极区域形成在栅极堆叠下方的半导体层中的有源区域附近。 有源区域包括渐变掺杂区域的至少一部分,源极和漏极区域以及有源区域具有相同的导电类型。