METHODS FOR DOPING A SUB-FIN REGION OF A SEMICONDUCTOR FIN STRUCTURE AND DEVICES CONTAINING THE SAME

    公开(公告)号:US20200211901A1

    公开(公告)日:2020-07-02

    申请号:US15752189

    申请日:2015-09-17

    Abstract: Methods for doping a subfin region of a semiconductor fin structure include forming a fin on a substrate; forming an oxide material on the substrate and a portion of the fin that corresponds to a sub-fin region of the fin; forming a hard mask on a top-fin region of the fin that is disposed above the sub-fin region; exposing a surface of the sub-fin region by removing the oxide material from a surface of the sub-fin region and leaving a layer of the oxide material on the substrate; depositing a dopant material on the hard mask, the surface of the subfin region, and the layer of the oxide material on the substrate; and removing the hard mask from the top-fin region to expose a surface of the top-fin region. Devices constructed using the disclosed methods are also provided, and other embodiments are discussed

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