METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE
    14.
    发明申请
    METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE 审中-公开
    制造半导体器件的方法

    公开(公告)号:US20150325662A1

    公开(公告)日:2015-11-12

    申请号:US14698624

    申请日:2015-04-28

    Abstract: A method for manufacturing a semiconductor device, comprising: forming a gate trench on a substrate; forming a gate dielectric layer and a metal gate layer thereon in the gate trench; forming a first tungsten (W) layer on a surface of the metal gate layer, and forming a tungsten nitride (WN) blocking layer by injecting nitrogen (N) ions; and filling with W through an atomic layer deposition (ALD) process. The blocking layer prevents ions in the precursors from aggregating on an interface and penetrating into the metal gate layer and the gate dielectric layer. At the same time, adhesion of W is enhanced, a process window of W during planarization is increased, reliability of the device is improved and the gate resistance is further reduced.

    Abstract translation: 一种制造半导体器件的方法,包括:在衬底上形成栅极沟槽; 在栅极沟槽中形成栅极电介质层和金属栅极层; 在所述金属栅极层的表面上形成第一钨(W)层,通过注入氮(N)离子形成氮化钨(WN)阻挡层; 并通过原子层沉积(ALD)工艺填充W。 阻挡层防止前体中的离子在界面上聚集并渗入金属栅极层和栅极介电层。 同时,W的附着力增强,在平坦化期间W的工艺窗口增加,器件的可靠性提高,栅极电阻进一步降低。

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