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    Replacement metal gate structures providing independent control on work function and gate leakage current
    21.
    发明授权
    Replacement metal gate structures providing independent control on work function and gate leakage current 失效
    替代金属栅极结构提供对功函数和栅极漏电流的独立控制

    公开(公告)号：US08450169B2

    公开(公告)日：2013-05-28

    申请号：US12954946

    申请日：2010-11-29

    申请人： Unoh Kwon ,  Ramachandra Divakaruni ,  Siddarth A. Krishnan ,  Ravikumar Ramachandran

    发明人： Unoh Kwon ,  Ramachandra Divakaruni ,  Siddarth A. Krishnan ,  Ravikumar Ramachandran

    IPC分类号： H01L21/8238

    CPC分类号： H01L27/092 ,  H01L21/28088 ,  H01L21/82345 ,  H01L21/823462 ,  H01L21/823842 ,  H01L21/823857 ,  H01L27/088 ,  H01L27/0922 ,  H01L29/49 ,  H01L29/513 ,  H01L29/66545 ,  H01L29/7833 ,  H01L29/7843

    摘要： The thickness and composition of a gate dielectric can be selected for different types of field effect transistors through a planar high dielectric constant material portion, which can be provided only for selected types of field effect transistors. Further, the work function of field effect transistors can be tuned independent of selection of the material stack for the gate dielectric. A stack of a barrier metal layer and a first-type work function metal layer is deposited on a gate dielectric layer within recessed gate cavities after removal of disposable gate material portions. After patterning the first-type work function metal layer, a second-type work function metal layer is deposited directly on the barrier metal layer in the regions of the second type field effect transistor. A conductive material fills the gate cavities, and a subsequent planarization process forms dual work function metal gate structures.

    摘要翻译： 可以通过平面高介电常数材料部分为不同类型的场效应晶体管选择栅极电介质的厚度和组成，其可以仅针对选定类型的场效应晶体管提供。 此外，场效应晶体管的工作功能可以独立于栅极电介质的材料堆叠的选择而被调整。 在去除一次性栅极材料部分之后，在凹入的栅极腔内的栅极电介质层上沉积阻挡金属层和第一类型功函数金属层的堆叠。 图案化第一型功函数金属层之后，第二类功函数金属层直接沉积在第二类场效应晶体管的区域中的阻挡金属层上。 导电材料填充栅极腔，随后的平坦化工艺形成双功能金属栅极结构。

    METHOD TO OPTIMIZE WORK FUNCTION IN COMPLEMENTARY METAL OXIDE SEMICONDUCTOR (CMOS) STRUCTURES
    22.
    发明申请
    METHOD TO OPTIMIZE WORK FUNCTION IN COMPLEMENTARY METAL OXIDE SEMICONDUCTOR (CMOS) STRUCTURES 有权
    补充金属氧化物半导体（CMOS）结构中的工作功能的优化方法

    公开(公告)号：US20110269276A1

    公开(公告)日：2011-11-03

    申请号：US12770792

    申请日：2010-04-30

    申请人： Unoh Kwon ,  Dechao Guo ,  Siddarth A. Krishnan ,  Ramachandran Muralidhar

    发明人： Unoh Kwon ,  Dechao Guo ,  Siddarth A. Krishnan ,  Ramachandran Muralidhar

    IPC分类号： H01L21/8238 ,  H01L21/28

    CPC分类号： H01L29/66545 ,  H01L21/28088 ,  H01L21/823807 ,  H01L21/823842 ,  H01L29/1054 ,  H01L29/42372 ,  H01L29/665 ,  H01L29/6656 ,  H01L29/7843

    摘要： In one embodiment, the method for forming a complementary metal oxide semiconductor (CMOS) device includes providing a semiconductor substrate including a first device region and a second device region. An n-type conductivity semiconductor device is formed in one of the first device region or the second device region using a gate structure first process, in which the n-type conductivity semiconductor device includes a gate structure having an n-type work function metal layer. A p-type conductivity semiconductor device is formed in the other of the first device region or the second device region using a gate structure last process, in which the p-type conductivity semiconductor device includes a gate structure including a p-type work function metal layer.

    摘要翻译： 在一个实施例中，形成互补金属氧化物半导体（CMOS）器件的方法包括提供包括第一器件区域和第二器件区域的半导体衬底。 使用栅极结构第一工艺在第一器件区域或第二器件区域之一中形成n型导电性半导体器件，其中n型导电性半导体器件包括具有n型功函数金属层的栅极结构 。 使用栅极结构最后工艺在第一器件区域或第二器件区域中的另一个中形成p型导电性半导体器件，其中p型导电半导体器件包括具有p型功函数金属 层。

    Gate Effective-Workfunction Modification for CMOS
    25.
    发明申请
    Gate Effective-Workfunction Modification for CMOS 有权
    门有效功能修改CMOS

    公开(公告)号：US20090212369A1

    公开(公告)日：2009-08-27

    申请号：US12037158

    申请日：2008-02-26

    申请人： Dae-Gyu Park ,  Michael P. Chudzik ,  Rashmi Jha ,  Siddarth A. Krishnan ,  Naim Moumen ,  Vijay Narayanan ,  Vamsi Paruchuri

    发明人： Dae-Gyu Park ,  Michael P. Chudzik ,  Rashmi Jha ,  Siddarth A. Krishnan ,  Naim Moumen ,  Vijay Narayanan ,  Vamsi Paruchuri

    IPC分类号： H01L21/8238

    CPC分类号： H01L21/823857 ,  H01L21/823842 ,  H01L29/785

    摘要： CMOS circuit structures are disclosed with the PFET and NFET devices having high-k dielectric layers consisting of the same gate insulator material, and metal gate layers consisting of the same gate metal material. The PFET device has a “p” interface control layer which is capable of shifting the effective-workfunction of the gate in the p-direction. In a representative embodiment of the invention the “p” interface control layer is aluminum oxide. The NFET device may have an “n” interface control layer. The materials of the “p” and “n” interface control layers are differing materials. The “p” and “n” interface control layers are positioned to the opposite sides of their corresponding high-k dielectric layers. Methods for fabricating the CMOS circuit structures with the oppositely positioned “p” and “n” interface control layers are also disclosed.

    摘要翻译： 公开了CMOS电路结构，其中PFET和NFET器件具有由相同的栅极绝缘体材料构成的高k电介质层以及由相同栅极金属材料组成的金属栅极层。 PFET器件具有能够沿p方向移动栅极的有效功能的“p”接口控制层。 在本发明的代表性实施例中，“p”界面控制层是氧化铝。 NFET器件可以具有“n”个界面控制层。 “p”和“n”界面控制层的材料是不同的材料。 “p”和“n”界面控制层位于其相应的高k电介质层的相对侧。 还公开了制造具有相对定位的“p”和“n”界面控制层的CMOS电路结构的方法。

    Replacement Metal Gate Structures Providing Independent Control On Work Function and Gate Leakage Current
    27.
    发明申请
    Replacement Metal Gate Structures Providing Independent Control On Work Function and Gate Leakage Current 失效
    替代金属栅极结构提供工作功能和栅极泄漏电流的独立控制

    公开(公告)号：US20120132998A1

    公开(公告)日：2012-05-31

    申请号：US12954946

    申请日：2010-11-29

    申请人： Unoh Kwon ,  Ramachandra Divakaruni ,  Siddarth A. Krishnan ,  Ravikumar Ramachandran

    发明人： Unoh Kwon ,  Ramachandra Divakaruni ,  Siddarth A. Krishnan ,  Ravikumar Ramachandran

    IPC分类号： H01L27/092 ,  H01L21/336

    CPC分类号： H01L27/092 ,  H01L21/28088 ,  H01L21/82345 ,  H01L21/823462 ,  H01L21/823842 ,  H01L21/823857 ,  H01L27/088 ,  H01L27/0922 ,  H01L29/49 ,  H01L29/513 ,  H01L29/66545 ,  H01L29/7833 ,  H01L29/7843

    摘要： The thickness and composition of a gate dielectric can be selected for different types of field effect transistors through a planar high dielectric constant material portion, which can be provided only for selected types of field effect transistors. Further, the work function of field effect transistors can be tuned independent of selection of the material stack for the gate dielectric. A stack of a barrier metal layer and a first-type work function metal layer is deposited on a gate dielectric layer within recessed gate cavities after removal of disposable gate material portions. After patterning the first-type work function metal layer, a second-type work function metal layer is deposited directly on the barrier metal layer in the regions of the second type field effect transistor. A conductive material fills the gate cavities, and a subsequent planarization process forms dual work function metal gate structures.

    摘要翻译： 可以通过平面高介电常数材料部分为不同类型的场效应晶体管选择栅极电介质的厚度和组成，其可以仅针对选定类型的场效应晶体管提供。 此外，场效应晶体管的工作功能可以独立于栅极电介质的材料堆叠的选择而被调整。 在去除一次性栅极材料部分之后，在凹入的栅极腔内的栅极电介质层上沉积阻挡金属层和第一类型功函数金属层的堆叠。 图案化第一型功函数金属层之后，第二类功函数金属层直接沉积在第二类型场效应晶体管的区域中的势垒金属层上。 导电材料填充栅极腔，随后的平坦化工艺形成双功能金属栅极结构。

    Gate Effective-Workfunction Modification for CMOS
    30.
    发明申请
    Gate Effective-Workfunction Modification for CMOS 有权
    门有效功能修改CMOS

    公开(公告)号：US20110121401A1

    公开(公告)日：2011-05-26

    申请号：US13019949

    申请日：2011-02-02

    申请人： Dae-Gyu Park ,  Michael P. Chudzik ,  Rashmi Jha ,  Siddarth A. Krishnan ,  Naim Moumen ,  Vijay Narayanan ,  Vamsi Paruchuri

    发明人： Dae-Gyu Park ,  Michael P. Chudzik ,  Rashmi Jha ,  Siddarth A. Krishnan ,  Naim Moumen ,  Vijay Narayanan ,  Vamsi Paruchuri

    IPC分类号： H01L27/092

    CPC分类号： H01L21/823857 ,  H01L21/823842 ,  H01L29/785

    摘要： CMOS circuit structures are disclosed with the PFET and NFET devices having high-k dielectric layers consisting of the same gate insulator material, and metal gate layers consisting of the same gate metal material. The PFET device has a “p” interface control layer which is capable of shifting the effective-workfunction of the gate in the p-direction. In a representative embodiment of the invention the “p” interface control layer is aluminum oxide. The NFET device may have an “n” interface control layer. The materials of the “p” and “n” interface control layers are differing materials. The “p” and “n” interface control layers are positioned to the opposite sides of their corresponding high-k dielectric layers. Methods for fabricating the CMOS circuit structures with the oppositely positioned “p” and “n” interface control layers are also disclosed.

    摘要翻译： 公开了CMOS电路结构，其中PFET和NFET器件具有由相同的栅极绝缘体材料构成的高k电介质层以及由相同栅极金属材料组成的金属栅极层。 PFET器件具有能够沿p方向移动栅极的有效功能的“p”接口控制层。 在本发明的代表性实施例中，“p”界面控制层是氧化铝。 NFET器件可以具有“n”个界面控制层。 “p”和“n”界面控制层的材料是不同的材料。 “p”和“n”界面控制层位于其相应的高k电介质层的相对侧。 还公开了制造具有相对定位的“p”和“n”界面控制层的CMOS电路结构的方法。