Methods of Forming Field Effect Transistors and Devices Formed Thereby
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    发明申请
    Methods of Forming Field Effect Transistors and Devices Formed Thereby 审中-公开
    形成场效应晶体管和器件的方法

    公开(公告)号:US20100102399A1

    公开(公告)日:2010-04-29

    申请号:US12606327

    申请日:2009-10-27

    IPC分类号: H01L29/78 H01L21/8236

    摘要: Methods of forming field effect transistors include forming a first gate electrode on a semiconductor substrate and forming insulating spacers on sidewalls of the first gate electrode. At least a portion of the first gate electrode is then removed from between the insulating spacers to thereby expose inner sidewalls of the insulating spacers. Threshold-voltage adjusting impurities are then implanted into the semiconductor substrate, using the insulating spacers as an implant mask. These threshold-voltage adjusting impurities are selected from a group consisting of alkali metals from Group 1 of the periodic chart and halogens from Group 17 of the periodic chart. A second gate electrode is then formed between the inner sidewalls of the insulating spacers.

    摘要翻译: 形成场效应晶体管的方法包括在半导体衬底上形成第一栅电极,并在第一栅电极的侧壁上形成绝缘衬垫。 然后从绝缘间隔物之间​​移除第一栅电极的至少一部分,从而暴露绝缘间隔物的内侧壁。 然后使用绝缘间隔物作为植入物掩模将阈值电压调整杂质注入到半导体衬底中。 这些阈值电压调节杂质选自周期表第1组的碱金属和周期表第17组的卤素。 然后在绝缘间隔件的内侧壁之间形成第二栅电极。