Metal gate stack with etch stop layer having implanted metal species
    67.
    发明授权
    Metal gate stack with etch stop layer having implanted metal species 有权
    具有蚀刻停止层的具有植入金属物质的金属栅极叠层

    公开(公告)号:US06444513B1

    公开(公告)日:2002-09-03

    申请号:US09810348

    申请日:2001-03-19

    IPC分类号: H01L218238

    摘要: A metal gate structure and method of forming the same introduces metal impurities into a first metal layer, made of TiN, for example. The impurities create a surface region of greater etch selectivity that prevents overetching of the TiN during the etching of an overlying tungsten gate during the formation of the metal gate structure. The prevention of the overetching of the TiN protects the gate oxide from undesirable degradation. The provision of aluminum or tantalum as the metal impurities provides adequate etch stopping capability and does not undesirably affect the work function of the TiN.

    摘要翻译: 金属栅结构及其形成方法将金属杂质引入例如由TiN制成的第一金属层中。 这些杂质产生更大的蚀刻选择性的表面区域,其防止了在形成金属栅极结构期间在覆盖钨栅的蚀刻过程中TiN的过蚀刻。 防止TiN的过蚀刻保护栅极氧化物免受不希望的退化。 提供铝或钽作为金属杂质提供了足够的蚀刻停止能力,并且不会不希望地影响TiN的功函数。

    Definition of small damascene metal gates using reverse through approach
    69.
    发明授权
    Definition of small damascene metal gates using reverse through approach 有权
    使用反向通过方法定义小型镶嵌金属门

    公开(公告)号:US06406950B1

    公开(公告)日:2002-06-18

    申请号:US09732125

    申请日:2000-12-07

    IPC分类号: H01L21338

    摘要: Various methods of fabricating circuit devices incorporating a gate stack are disclosed. In one aspect, a method of fabricating a circuit device on a substrate is provided that includes forming a first insulating film on the substrate and etching the first insulating film to define a temporary gate structure. A second insulating film is formed on the substrate adjacent to the temporary gate structure. The temporary gate structure is removed to leave an opening extending to the substrate. A gate stack is formed in the opening. The process of the present invention provides for metal gate definition with sub-lithographic limit critical dimensions.

    摘要翻译: 公开了制造并入门叠层的电路装置的各种方法。 一方面,提供一种在基板上制造电路器件的方法,其包括在衬底上形成第一绝缘膜并蚀刻第一绝缘膜以限定临时栅极结构。 在与临时栅极结构相邻的衬底上形成第二绝缘膜。 去除临时栅极结构以留下延伸到基板的开口。 在开口中形成栅极叠层。 本发明的方法提供具有亚光刻极限关键尺寸的金属栅极定义。