Quantum well transistor using high dielectric constant dielectric layer
    62.
    发明申请
    Quantum well transistor using high dielectric constant dielectric layer 审中-公开
    量子阱晶体管采用高介电常数介电层

    公开(公告)号:US20060148182A1

    公开(公告)日:2006-07-06

    申请号:US11028378

    申请日:2005-01-03

    IPC分类号: H01L21/336

    CPC分类号: H01L29/66871 H01L29/7784

    摘要: A quantum well transistor or high electron mobility transistor may be formed using a replacement metal gate process. A dummy gate electrode may be used to define sidewall spacers and source drain contact metallizations. The dummy gate electrode may be removed and the remaining structure used as a mask to etch a doped layer to form sources and drains self-aligned to said opening. A high dielectric constant material may coat the sides of said opening and then a metal gate electrode may be deposited. As a result, the sources and drains are self-aligned to the metal gate electrode. In addition, the metal gate electrode is isolated from an underlying barrier layer by the high dielectric constant material.

    摘要翻译: 可以使用替代金属栅极工艺形成量子阱晶体管或高电子迁移率晶体管。 可以使用虚拟栅电极来限定侧壁间隔件和源漏接触金属化。 可以去除虚拟栅电极,并且将剩余的结构用作掩模以蚀刻掺杂层以形成源并且将其排列到所述开口自对准。 高介电常数材料可以覆盖所述开口的侧面,然后可以沉积金属栅极电极。 结果,源极和漏极与金属栅电极自对准。 此外,金属栅电极通过高介电常数材料与下面的阻挡层隔离。