METHODS OF FABRICATING SEMICONDUCTOR DEVICES WITH DIFFERENTIALLY NITRIDED GATE INSULATORS
    4.
    发明申请
    METHODS OF FABRICATING SEMICONDUCTOR DEVICES WITH DIFFERENTIALLY NITRIDED GATE INSULATORS 审中-公开
    用不同绝缘栅绝缘体制作半导体器件的方法

    公开(公告)号:US20110306171A1

    公开(公告)日:2011-12-15

    申请号:US13105652

    申请日:2011-05-11

    IPC分类号: H01L21/8238 H01L21/28

    摘要: An insulation layer is formed on a substrate having an NMOS region and a PMOS region defined therein. A first conductive layer is formed on the insulation layer in the PMOS region, leaving a portion of the insulation layer in the NMOS region exposed. Nitriding is performed to produce a first nitrogen concentration in the insulation layer in the NMOS region and a second nitrogen concentration less than the first nitrogen concentration in the insulation layer in the PMOS region. A second conductive layer is formed on the insulation layer and the first conductive layer and the first and second conductive layers and the insulation layer are patterned to form a first gate structure and a second gate structure in the NMOS region and the PMOS region, respectively.

    摘要翻译: 在其上限定有NMOS区和PMOS区的基板上形成绝缘层。 在PMOS区域中的绝缘层上形成第一导电层,使NMOS区域中的绝缘层的一部分露出。 进行氮化,以在NMOS区域中的绝缘层中产生第一氮浓度,并且在PMOS区域中的绝缘层中小于第一氮浓度的第二氮浓度。 第二导电层形成在绝缘层上,并且第一导电层以及第一和第二导电层和绝缘层被图案化以分别在NMOS区域和PMOS区域中形成第一栅极结构和第二栅极结构。