A METHOD OF MAKING METAL GATE TRANSISTORS
    1.
    发明申请
    A METHOD OF MAKING METAL GATE TRANSISTORS 失效
    制造金属栅极晶体管的方法

    公开(公告)号:US20080001202A1

    公开(公告)日:2008-01-03

    申请号:US11427980

    申请日:2006-06-30

    IPC分类号: H01L29/94

    摘要: A semiconductor device has a gate with three conductive layers over a high K gate dielectric. The first layer is substantially oxygen free. The work function is modulated to the desired work function by a second conductive layer in response to subsequent thermal processing. The second layer is a conductive oxygen-bearing metal. With sufficient thickness of the first layer, there is minimal penetration of oxygen from the second layer through the first layer to adversely impact the gate dielectric but sufficient penetration of oxygen to change the work function to a more desirable level. A third layer, which is metallic, is deposited over the second layer. A polysilicon layer is deposited over the third layer. The third layer prevents the polysilicon layer and the oxygen-bearing layer from reacting together.

    摘要翻译: 半导体器件具有在高K栅极电介质上的具有三个导电层的栅极。 第一层基本上是无氧的。 响应于随后的热处理,功函数被第二导电层调制到期望的功函数。 第二层是导电含氧金属。 具有足够的第一层的厚度,氧从第二层穿过第一层的最小穿透而不利地影响栅极电介质,但充分渗入氧气以将功函数改变到更理想的水平。 金属的第三层沉积在第二层上。 多晶硅层沉积在第三层上。 第三层防止多晶硅层和含氧层一起反应。

    Method of making metal gate transistors
    3.
    发明授权
    Method of making metal gate transistors 失效
    制造金属栅晶体管的方法

    公开(公告)号:US07655550B2

    公开(公告)日:2010-02-02

    申请号:US11427980

    申请日:2006-06-30

    IPC分类号: H01L21/4763

    摘要: A semiconductor device has a gate with three conductive layers over a high K gate dielectric. The first layer is substantially oxygen free. The work function is modulated to the desired work function by a second conductive layer in response to subsequent thermal processing. The second layer is a conductive oxygen-bearing metal. With sufficient thickness of the first layer, there is minimal penetration of oxygen from the second layer through the first layer to adversely impact the gate dielectric but sufficient penetration of oxygen to change the work function to a more desirable level. A third layer, which is metallic, is deposited over the second layer. A polysilicon layer is deposited over the third layer. The third layer prevents the polysilicon layer and the oxygen-bearing layer from reacting together.

    摘要翻译: 半导体器件具有在高K栅极电介质上的具有三个导电层的栅极。 第一层基本上是无氧的。 响应于随后的热处理,功函数被第二导电层调制到期望的功函数。 第二层是导电含氧金属。 具有足够的第一层的厚度,氧从第二层穿过第一层的最小穿透而不利地影响栅极电介质,但充分渗入氧气以将功函数改变到更理想的水平。 金属的第三层沉积在第二层上。 多晶硅层沉积在第三层上。 第三层防止多晶硅层和含氧层一起反应。

    Modulation of Tantalum-Based Electrode Workfunction
    5.
    发明申请
    Modulation of Tantalum-Based Electrode Workfunction 审中-公开
    钽电极工作功能的调制

    公开(公告)号:US20090286387A1

    公开(公告)日:2009-11-19

    申请号:US12122178

    申请日:2008-05-16

    摘要: A semiconductor process and apparatus fabricate a metal gate electrode by forming a first conductive layer (14) over a gate dielectric layer (12) and then selectively introducing nitrogen into the portions of the first conductive layer (14) in the PMOS device region (1), either by annealing (42) a nitrogen-containing diffusion layer (22) formed in the PMOS device region (1) or by performing an ammonia anneal process (82) while the NMOS device region (2) is masked. By introducing nitrogen into the first conductive layer (14), the work function is modulated toward PMOS band edge.

    摘要翻译: 一种半导体工艺和装置,通过在栅介质层(12)上形成第一导电层(14)制造金属栅电极,然后选择性地将氮引入PMOS器件区域(1)中的第一导电层(14)的部分 ),通过在形成于PMOS器件区域(1)中的含氮扩散层(22)退火(42),或者在NMOS器件区域(2)被掩蔽的同时执行氨退火工艺(82)。 通过将氮引入到第一导电层(14)中,功函数被调制到PMOS带边缘。

    METHOD FOR FORMING A DUAL METAL GATE STRUCTURE
    9.
    发明申请
    METHOD FOR FORMING A DUAL METAL GATE STRUCTURE 有权
    形成双金属门结构的方法

    公开(公告)号:US20090004792A1

    公开(公告)日:2009-01-01

    申请号:US11771721

    申请日:2007-06-29

    IPC分类号: H01L21/8238

    摘要: A method for forming a semiconductor structure includes forming a channel region layer over a semiconductor layer where the semiconductor layer includes a first and a second well region, forming a protection layer over the channel region layer, forming a first gate dielectric layer over the first well region, forming a first metal gate electrode layer over the first gate dielectric, removing the protection layer, forming a second gate dielectric layer over the channel region layer, forming a second metal gate electrode layer over the second gate dielectric layer, and forming a first gate stack including a portion of each of the first gate dielectric layer and the first metal gate electrode layer over the first well region and forming a second gate stack including a portion of each of the second gate dielectric layer and the second metal gate electrode layer over the channel region layer.

    摘要翻译: 一种用于形成半导体结构的方法包括在半导体层上形成沟道区层,其中半导体层包括第一和第二阱区,在沟道区上形成保护层,在第一阱上形成第一栅极电介质层 在所述第一栅极电介质上形成第一金属栅极电极层,去除所述保护层,在所述沟道区域上形成第二栅极电介质层,在所述第二栅极介电层上方形成第二金属栅极电极层, 栅极堆叠,其包括第一阱区域上的第一栅极电介质层和第一金属栅电极层中的每一个的一部分,并且形成包括第二栅极电介质层和第二金属栅极电极层中的每一个的第二栅极堆叠, 通道区域层。

    Method for forming a dual metal gate structure
    10.
    发明授权
    Method for forming a dual metal gate structure 有权
    双金属栅极结构的形成方法

    公开(公告)号:US07666730B2

    公开(公告)日:2010-02-23

    申请号:US11771721

    申请日:2007-06-29

    IPC分类号: H01L21/8238

    摘要: A method for forming a semiconductor structure includes forming a channel region layer over a semiconductor layer where the semiconductor layer includes a first and a second well region, forming a protection layer over the channel region layer, forming a first gate dielectric layer over the first well region, forming a first metal gate electrode layer over the first gate dielectric, removing the protection layer, forming a second gate dielectric layer over the channel region layer, forming a second metal gate electrode layer over the second gate dielectric layer, and forming a first gate stack including a portion of each of the first gate dielectric layer and the first metal gate electrode layer over the first well region and forming a second gate stack including a portion of each of the second gate dielectric layer and the second metal gate electrode layer over the channel region layer.

    摘要翻译: 一种用于形成半导体结构的方法包括在半导体层上形成沟道区层,其中半导体层包括第一和第二阱区,在沟道区上形成保护层,在第一阱上形成第一栅极电介质层 在所述第一栅极电介质上形成第一金属栅极电极层,去除所述保护层,在所述沟道区域上形成第二栅极电介质层,在所述第二栅极介电层上方形成第二金属栅极电极层, 栅极堆叠,其包括第一阱区域上的第一栅极电介质层和第一金属栅电极层中的每一个的一部分,并且形成包括第二栅极电介质层和第二金属栅极电极层中的每一个的第二栅极堆叠, 通道区域层。