Semiconductor device having a metal electrode interconnection film with
two layers of silicide
    31.
    发明授权
    Semiconductor device having a metal electrode interconnection film with two layers of silicide 失效
    具有具有两层硅化物的金属电极互连膜的半导体器件

    公开(公告)号:US4910578A

    公开(公告)日:1990-03-20

    申请号:US159401

    申请日:1988-02-11

    申请人: Tatsuo Okamoto

    发明人: Tatsuo Okamoto

    摘要: A semiconductor device comprises a silicon substrate (1) formed with impurity diffusion layers (5, 9) in a region defined by insulating films (2a, 2b) for separating elements and an aluminum alloy film (11) for electrode interconnection having a contact hole portion 7 whose bottom is electrically in contact with the impurity diffusion layers (5, 9). A titanium silicide (TiSi.sub.2) film (4) is deposited on the surfaces of the impurity diffusion layers (5, 9) to reduce sheet resistivity thereof as well as reduce contact resistance between the same and the aluminum alloy film (11). A molybdenum silicide (MoSi.sub.2) film (8) is further formed thereon to prevent the TiSi.sub.2 film (4) from corrosion in removal of an oxide film through etching, while a titanium nitride (TiN) film (10) is formed thereon to prevent thermal reaction of the aluminum alloy film (11) and the MoSi.sub.2 film (8).

    摘要翻译: 半导体器件包括在用于分离元件的绝缘膜(2a,2b)限定的区域中形成有杂质扩散层(5,9)的硅衬底(1)和用于电极互连的铝合金膜(11),其具有接触孔 其底部与杂质扩散层(5,9)电接触。 在杂质扩散层(5,9)的表面上沉积硅化钛(TiSi 2)膜(4)以降低其电阻率,并降低其与铝合金膜(11)之间的接触电阻。 在其上进一步形成硅化钼(MoSi2)膜(8),以防止TiSi2膜(4)在通过蚀刻去除氧化膜时被腐蚀,同时在其上形成氮化钛(TiN)膜(10)以防止热 铝合金膜(11)和MoSi2膜(8)的反应。