Metal oxide semiconductor transistor and method of manufacturing the same
    12.
    发明授权
    Metal oxide semiconductor transistor and method of manufacturing the same 有权
    金属氧化物半导体晶体管及其制造方法

    公开(公告)号:US08580625B2

    公开(公告)日:2013-11-12

    申请号:US13188536

    申请日:2011-07-22

    IPC分类号: H01L21/00 H01L21/84

    摘要: A method for manufacturing a MOS transistor is provided. A substrate has a high-k dielectric layer and a barrier in each of a first opening and a second opening formed by removing a dummy gate and located in a first transistor region and a second transistor region. A dielectric barrier layer is formed on the substrate and filled into the first opening and the second opening to cover the barrier layers. A portion of the dielectric barrier in the first transistor region is removed. A first work function metal layer is formed. The first work function metal layer and a portion of the dielectric barrier layer in the second transistor region are removed. A second work function metal layer is formed. The method can avoid a loss of the high-k dielectric layer to maintain the reliability of a gate structure, thereby improving the performance of the MOS transistor.

    摘要翻译: 提供一种制造MOS晶体管的方法。 基板在通过去除伪栅极并位于第一晶体管区域和第二晶体管区域中形成的第一开口和第二开口中的每一个中具有高k电介质层和势垒。 介电阻挡层形成在衬底上并填充到第一开口和第二开口中以覆盖阻挡层。 去除第一晶体管区域中的介电阻挡层的一部分。 形成第一功函数金属层。 去除第一功函数金属层和第二晶体管区域中的介电阻挡层的一部分。 形成第二功函数金属层。 该方法可以避免高k电介质层的损失,以保持栅极结构的可靠性,从而提高MOS晶体管的性能。