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    Methods for protecting gate stacks during fabrication of semiconductor devices and semiconductor devices fabricated from such methods
    12.
    发明授权
    Methods for protecting gate stacks during fabrication of semiconductor devices and semiconductor devices fabricated from such methods 有权
    用于在由这种方法制造的半导体器件和半导体器件的制造期间保护栅极堆叠的方法

    公开(公告)号：US08217463B2

    公开(公告)日：2012-07-10

    申请号：US13021403

    申请日：2011-02-04

    Applicant: Rohit Pal ,  Michael Hargrove ,  Frank Bin Yang

    Inventor： Rohit Pal ,  Michael Hargrove ,  Frank Bin Yang

    IPC: H01L29/66

    CPC classification number: H01L29/66651 ,  H01L21/28123 ,  H01L21/28194 ,  H01L21/28247 ,  H01L29/495 ,  H01L29/4966 ,  H01L29/517

    Abstract: Methods for protecting gate stacks during fabrication of semiconductor devices and semiconductor devices fabricated from such methods are provided. Methods for fabricating a semiconductor device include providing a semiconductor substrate having an active region and a shallow trench isolation (STI) region. Epitaxial layer is formed on the active region to define a lateral overhang portion in a divot at the active region/STI region interface. A gate stack is formed having a first gate stack-forming layer overlying the semiconductor substrate. First gate stack-forming layer includes a non-conformal layer of metal gate-forming material which is directionally deposited to form a thinned break portion just below the lateral overhang portion. After the step of forming the gate stack, a first portion of the non-conformal layer is in the gate stack and a second portion is exposed. The thinned break portion at least partially isolates the first and second portions during subsequent etch chemistries.

    Abstract translation: 提供了在由这些方法制造的半导体器件和半导体器件的制造期间保护栅极堆叠的方法。 制造半导体器件的方法包括提供具有有源区和浅沟槽隔离（STI）区的半导体衬底。 在有源区上形成外延层，以在有源区/ STI区界面上的边界中限定一个横向伸出部分。 形成具有覆盖在半导体衬底上的第一栅叠层形成层的栅叠层。 第一栅极堆叠形成层包括定向沉积以形成刚好在横向突出部分下方的变薄的断裂部分的非保形层的金属栅极形成材料。 在形成栅极堆叠的步骤之后，非共形层的第一部分在栅极堆叠中并且第二部分被暴露。 减薄断裂部分在随后的蚀刻化学过程中至少部分地隔离第一和第二部分。

    Methods for fabricating MOS devices having epitaxially grown stress-inducing source and drain regions
    13.
    发明授权
    Methods for fabricating MOS devices having epitaxially grown stress-inducing source and drain regions 有权
    制造具有外延生长的应力诱导源极和漏极区域的MOS器件的方法

    公开(公告)号：US07670934B1

    公开(公告)日：2010-03-02

    申请号：US12359764

    申请日：2009-01-26

    Applicant: Rohit Pal ,  Frank Bin Yang

    Inventor： Rohit Pal ,  Frank Bin Yang

    IPC: H01L21/20 ,  H01L21/36

    CPC classification number: H01L21/823412 ,  H01L21/823418 ,  H01L21/823807 ,  H01L21/823814 ,  H01L21/84

    Abstract: Methods of fabricating a semiconductor device on and in a semiconductor substrate having a first region and a second region are provided. In accordance with an exemplary embodiment of the invention, a method comprises forming a first gate stack overlying the first region and a second gate stack overlying the second region, etching into the substrate first recesses and second recesses, the first recesses aligned at least to the first gate stack in the first region, and the second recesses aligned at least to the second gate stack in the second region, epitaxially growing a first stress-inducing monocrystalline material in the first and second recesses, removing the first stress-inducing monocrystalline material from the first recesses, and epitaxially growing a second stress-inducing monocrystalline material in the first recesses, wherein the second stress-inducing monocrystalline material has a composition different from the first stress-inducing monocrystalline material.

    Abstract translation: 提供了在具有第一区域和第二区域的半导体衬底上和半导体衬底中制造半导体器件的方法。 根据本发明的示例性实施例，一种方法包括形成覆盖第一区域的第一栅极堆叠和覆盖第二区域的第二栅极堆叠，蚀刻到衬底中的第一凹陷和第二凹槽，第一凹陷至少对准 第一栅极堆叠在第一区域中，并且第二凹陷至少对准第二区域中的第二栅极堆叠，在第一和第二凹槽中外延生长第一应力诱导单晶材料，从第一和第二凹槽中去除第一应力诱导单晶材料 第一凹陷，并且在第一凹陷中外延生长第二应力诱导单晶材料，其中第二应力诱导单晶材料具有不同于第一应力诱导单晶材料的组成。

    METHOD OF CONTROLLING EMBEDDED MATERIAL/GATE PROXIMITY
    14.
    发明申请
    METHOD OF CONTROLLING EMBEDDED MATERIAL/GATE PROXIMITY 有权
    控制嵌入材料/栅格近似的方法

    公开(公告)号：US20090280579A1

    公开(公告)日：2009-11-12

    申请号：US12119196

    申请日：2008-05-12

    Applicant: Rohit Pal ,  David E. Brown ,  Alok Vaid ,  Kevin Lensing

    Inventor： Rohit Pal ,  David E. Brown ,  Alok Vaid ,  Kevin Lensing

    IPC: H01L21/66

    CPC classification number: H01L29/7848 ,  H01L22/12 ,  H01L22/20 ,  H01L29/66636 ,  H01L29/78

    Abstract: A method that includes forming a gate of a semiconductor device on a substrate and forming a recess for an embedded silicon-straining material in source and drain regions for the gate. In this method, a proximity value, which is defined as a distance between the gate and a closest edge of the recess, is controlled by controlling formation of an oxide layer provided beneath the gate. The method can also include feedforward control of process steps in the formation of the recess based upon values measured during the formation of the recess. The method can also apply feedback control to adjust a subsequent recess formation process performed on a subsequent semiconductor device based on the comparison between a measured proximity value and a target proximity value to decrease a difference between a proximity value of the subsequent semiconductor device and the target proximity value.

    Abstract translation: 一种方法，包括在衬底上形成半导体器件的栅极，并在栅极的源极和漏极区域中形成嵌入的硅应变材料的凹部。 在该方法中，通过控制形成在栅极下方的氧化物层来控制被定义为栅极和凹部的最近边缘之间的距离的接近值。 该方法还可以包括基于在形成凹部期间测量的值来形成凹部中的工艺步骤的前馈控制。 该方法还可以基于测量的接近度值和目标接近值之间的比较来应用反馈控制来调整对随后的半导体器件执行的随后的凹陷形成处理，以减小随后的半导体器件的接近值与目标之间的差异 接近值。

    Formation of a channel semiconductor alloy by a nitride hard mask layer and an oxide mask
    16.
    发明授权
    Formation of a channel semiconductor alloy by a nitride hard mask layer and an oxide mask 有权
    通过氮化物硬掩模层和氧化物掩模形成沟道半导体合金

    公开(公告)号：US08673710B2

    公开(公告)日：2014-03-18

    申请号：US13197387

    申请日：2011-08-03

    Applicant: Stephan Kronholz ,  Rohit Pal

    Inventor： Stephan Kronholz ,  Rohit Pal

    IPC: H01L21/8238

    CPC classification number: H01L21/823878 ,  H01L21/823807 ,  H01L21/823814

    Abstract: When forming sophisticated high-k metal gate electrode structures, the uniformity of the device characteristics may be enhanced by growing a threshold adjusting semiconductor alloy on the basis of a hard mask regime, which may result in a less pronounced surface topography, in particular in densely packed device areas. To this end, in some illustrative embodiments, a deposited hard mask material may be used for selectively providing an oxide mask of reduced thickness and superior uniformity.

    Abstract translation: 当形成复杂的高k金属栅电极结构时，可以通过基于硬掩模方式生长阈值调节半导体合金来增强器件特性的均匀性，这可能导致不太显着的表面形貌，特别是在密集 包装设备区域。 为此，在一些说明性实施例中，沉积的硬掩模材料可用于选择性地提供厚度减小和均匀性优异的氧化物掩模。

    Method of manufacturing a transistor device having asymmetric embedded strain elements
    19.
    发明授权
    Method of manufacturing a transistor device having asymmetric embedded strain elements 有权
    制造具有非对称嵌入式应变元件的晶体管器件的方法

    公开(公告)号：US08293609B2

    公开(公告)日：2012-10-23

    申请号：US13355221

    申请日：2012-01-20

    Applicant: Rohit Pal ,  Frank Bin Yang ,  Michael J. Hargrove

    Inventor： Rohit Pal ,  Frank Bin Yang ,  Michael J. Hargrove

    IPC: H01L21/336

    CPC classification number: H01L29/66636 ,  H01L21/26506 ,  H01L21/26586 ,  H01L21/3065 ,  H01L29/165 ,  H01L29/665 ,  H01L29/66659 ,  H01L29/7848

    Abstract: Semiconductor transistor devices and related fabrication methods are provided. An exemplary transistor device includes a layer of semiconductor material having a channel region defined therein and a gate structure overlying the channel region. Recesses are formed in the layer of semiconductor material adjacent to the channel region, such that the recesses extend asymmetrically toward the channel region. The transistor device also includes stress-inducing semiconductor material formed in the recesses. The asymmetric profile of the stress-inducing semiconductor material enhances carrier mobility in a manner that does not exacerbate the short channel effect.

    Abstract translation: 提供半导体晶体管器件及相关制造方法。 示例性晶体管器件包括其中限定有沟道区的半导体材料层和覆盖沟道区的栅极结构。 凹槽在与沟道区相邻的半导体材料层中形成，使得凹槽朝向沟道区不对称地延伸。 晶体管器件还包括形成在凹槽中的应力诱导半导体材料。 应力诱导半导体材料的不对称轮廓以不会加剧短通道效应的方式提高载流子迁移率。

    Methods for protecting film layers while removing hardmasks during fabrication of semiconductor devices
    20.
    发明授权
    Methods for protecting film layers while removing hardmasks during fabrication of semiconductor devices 有权
    在制造半导体器件期间去除硬掩模的同时保护膜层的方法

    公开(公告)号：US08278165B2

    公开(公告)日：2012-10-02

    申请号：US12577628

    申请日：2009-10-12

    Applicant: Rohit Pal ,  Janice Monzet

    Inventor： Rohit Pal ,  Janice Monzet

    IPC: H01L21/8238

    CPC classification number: H01L21/823807 ,  H01L21/31111 ,  H01L21/823878

    Abstract: Methods for fabricating semiconductor devices are provided. The methods include providing a semiconductor substrate having pFET and nFET regions, each having active areas and shallow trench isolation. A hardmask layer is formed overlying the semiconductor substrate. A photoresist layer is provided over the hardmask layer. The phoresist layer is patterned. An exposed portion of the hardmask layer is removed from one of the pFET region and nFET region with the patterned photoresist acting as an etch mask to define a masked region and an unmasked region. An epitaxial silicon layer is formed on the active area in the unmasked region. A protective oxide layer is formed overlying the epitaxial silicon layer. The hardmask layer is removed from the masked region with the protective oxide layer protecting the epitaxial silicon layer during such removal step. The protective oxide layer is removed from the epitaxial silicon layer.

    Abstract translation: 提供制造半导体器件的方法。 所述方法包括提供具有pFET和nFET区域的半导体衬底，每个具有有源区和浅沟槽隔离。 形成覆盖半导体衬底的硬掩模层。 在硬掩模层上提供光致抗蚀剂层。 光刻胶层被图案化。 硬掩模层的暴露部分从pFET区域和nFET区域中的一个去除，图案化的光致抗蚀剂用作蚀刻掩模以限定掩蔽区域和未掩模区域。 在未掩模区域的有源区域上形成外延硅层。 形成覆盖在外延硅层上的保护性氧化物层。 在这种去除步骤期间，保护氧化层保护外延硅层，从屏蔽区域去除硬掩模层。 从外延硅层去除保护氧化物层。

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