公开(公告)号：US08299535B2

公开(公告)日：2012-10-30

申请号：US12823163

申请日：2010-06-25

申请人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jeffrey B. Johnson ,  Jinghong Li ,  Dae-Gyu Park ,  Zhengmao Zhu

发明人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jeffrey B. Johnson ,  Jinghong Li ,  Dae-Gyu Park ,  Zhengmao Zhu

IPC分类号： H01L29/78 ,  H01L21/336 ,  H01L21/762 ,  H01L21/8234 ,  H01L21/8238

CPC分类号： H01L29/66636 ,  H01L21/823807 ,  H01L21/823814 ,  H01L29/165 ,  H01L29/665 ,  H01L29/6656 ,  H01L29/6659 ,  H01L29/7834 ,  H01L29/7848

摘要： Semiconductor structures are disclosed that have embedded stressor elements therein. The disclosed structures include at least one FET gate stack located on an upper surface of a semiconductor substrate. The at least one FET gate stack includes source and drain extension regions located within the semiconductor substrate at a footprint of the at least one FET gate stack. A device channel is also present between the source and drain extension regions and beneath the at least one gate stack. The structure further includes embedded stressor elements located on opposite sides of the at least one FET gate stack and within the semiconductor substrate. Each of the embedded stressor elements includes, from bottom to top, a first layer of a first epitaxy doped semiconductor material having a lattice constant that is different from a lattice constant of the semiconductor substrate and imparts a strain in the device channel, a second layer of a second epitaxy doped semiconductor material located atop the first layer, and a delta monolayer of dopant located on an upper surface of the second layer. The structure further includes a metal semiconductor alloy contact located directly on an upper surface of the delta monolayer.

摘要翻译： 公开了在其中具有嵌入的应力元件的半导体结构。 所公开的结构包括位于半导体衬底的上表面上的至少一个FET栅极堆叠。 所述至少一个FET栅极堆叠包括在所述至少一个FET栅极堆叠中的覆盖区域处位于所述半导体衬底内的源极和漏极延伸区域。 器件沟道也存在于源极延伸区域和漏极延伸区域之间以及至少一个栅极堆叠层下方。 该结构还包括位于至少一个FET栅极堆叠的相对侧上并且位于半导体衬底内的嵌入式应力元件。 每个嵌入式应力元件包括从底部到顶部的第一外延掺杂半导体材料的第一层，其具有不同于半导体衬底的晶格常数的晶格常数并且在器件沟道中施加应变;第二层 位于第一层顶部的第二外延掺杂半导体材料和位于第二层的上表面上的掺杂剂的Δ单层。 该结构还包括直接位于三角形单层的上表面上的金属半导体合金触点。

公开(公告)号：US20110316044A1

公开(公告)日：2011-12-29

申请号：US12823163

申请日：2010-06-25

申请人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jeffrey B. Johnson ,  Jinghong Li ,  Dae-Gyu Park ,  Zhengmao Zhu

发明人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jeffrey B. Johnson ,  Jinghong Li ,  Dae-Gyu Park ,  Zhengmao Zhu

IPC分类号： H01L29/78 ,  H01L21/336

CPC分类号： H01L29/66636 ,  H01L21/823807 ,  H01L21/823814 ,  H01L29/165 ,  H01L29/665 ,  H01L29/6656 ,  H01L29/6659 ,  H01L29/7834 ,  H01L29/7848

摘要： Semiconductor structures are disclosed that have embedded stressor elements therein. The disclosed structures include at least one FET gate stack located on an upper surface of a semiconductor substrate. The at least one FET gate stack includes source and drain extension regions located within the semiconductor substrate at a footprint of the at least one FET gate stack. A device channel is also present between the source and drain extension regions and beneath the at least one gate stack. The structure further includes embedded stressor elements located on opposite sides of the at least one FET gate stack and within the semiconductor substrate. Each of the embedded stressor elements includes, from bottom to top, a first layer of a first epitaxy doped semiconductor material having a lattice constant that is different from a lattice constant of the semiconductor substrate and imparts a strain in the device channel, a second layer of a second epitaxy doped semiconductor material located atop the first layer, and a delta monolayer of dopant located on an upper surface of the second layer. The structure further includes a metal semiconductor alloy contact located directly on an upper surface of the delta monolayer.

摘要翻译： 公开了在其中具有嵌入的应力元件的半导体结构。 所公开的结构包括位于半导体衬底的上表面上的至少一个FET栅极堆叠。 所述至少一个FET栅极堆叠包括在所述至少一个FET栅极堆叠中的覆盖区域处位于所述半导体衬底内的源极和漏极延伸区域。 器件沟道也存在于源极延伸区域和漏极延伸区域之间以及至少一个栅极堆叠层下方。 该结构还包括位于至少一个FET栅极堆叠的相对侧上并且位于半导体衬底内的嵌入式应力元件。 每个嵌入式应力元件包括从底部到顶部的第一外延掺杂半导体材料的第一层，其具有不同于半导体衬底的晶格常数的晶格常数并且在器件沟道中施加应变;第二层 位于第一层顶部的第二外延掺杂半导体材料和位于第二层的上表面上的掺杂剂的Δ单层。 该结构还包括直接位于三角形单层的上表面上的金属半导体合金触点。

公开(公告)号：US08421191B2

公开(公告)日：2013-04-16

申请号：US13533499

申请日：2012-06-26

申请人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jinghong Li ,  Joseph S. Newbury ,  Viorel Ontalus ,  Dae-Gyu Park ,  Zhengmao Zhu

发明人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jinghong Li ,  Joseph S. Newbury ,  Viorel Ontalus ,  Dae-Gyu Park ,  Zhengmao Zhu

IPC分类号： H01L31/117

CPC分类号： H01L29/7848 ,  H01L21/823807 ,  H01L21/823814 ,  H01L29/165 ,  H01L29/6656 ,  H01L29/66636 ,  H01L29/7834

摘要： Semiconductor structures are disclosed that include at least one FET gate stack located on a semiconductor substrate. The at least one FET gate stack includes source and drain extension regions located within the semiconductor substrate. A device channel is also present between the source and drain extension regions and beneath the at least one gate stack. Embedded stressor elements are located on opposite sides of the at least one FET gate stack and within the semiconductor substrate. Each stressor element includes a lower layer of a first epitaxy doped semiconductor material having a lattice constant that is different from a lattice constant of the semiconductor substrate and imparts a strain in the device channel, and an upper layer of a second epitaxy doped semiconductor material. At least one monolayer of dopant is located within the upper layer of each of the embedded stressor elements.

摘要翻译： 公开了包括位于半导体衬底上的至少一个FET栅叠层的半导体结构。 所述至少一个FET栅极堆叠包括位于半导体衬底内的源极和漏极延伸区域。 器件沟道也存在于源极延伸区域和漏极延伸区域之间以及至少一个栅极堆叠层下方。 嵌入式应力元件位于至少一个FET栅极堆叠的相对侧并且位于半导体衬底内。 每个应力元件包括第一外延掺杂半导体材料的下层，其具有不同于半导体衬底的晶格常数的晶格常数并且在器件沟道中施加应变，以及第二外延掺杂半导体材料的上层。 至少一个单层的掺杂剂位于每个嵌入的应力元件的上层内。

公开(公告)号：US08236660B2

公开(公告)日：2012-08-07

申请号：US12764329

申请日：2010-04-21

申请人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jinghong Li ,  Joseph S. Newbury ,  Viorel Ontalus ,  Dae-Gyu Park ,  Zhengmao Zhu

发明人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jinghong Li ,  Joseph S. Newbury ,  Viorel Ontalus ,  Dae-Gyu Park ,  Zhengmao Zhu

IPC分类号： H01L21/336

CPC分类号： H01L29/7848 ,  H01L21/823807 ,  H01L21/823814 ,  H01L29/165 ,  H01L29/6656 ,  H01L29/66636 ,  H01L29/7834

摘要： Semiconductor structures are disclosed that have embedded stressor elements therein. The disclosed structures include at least one FET gate stack located on an upper surface of a semiconductor substrate. The at least one FET gate stack includes source and drain extension regions located within the semiconductor substrate at a footprint of the at least one FET gate stack. A device channel is also present between the source and drain extension regions and beneath the at least one gate stack. The structure further includes embedded stressor elements located on opposite sides of the at least one FET gate stack and within the semiconductor substrate. Each of the embedded stressor elements includes a lower layer of a first epitaxy doped semiconductor material having a lattice constant that is different from a lattice constant of the semiconductor substrate and imparts a strain in the device channel, and an upper layer of a second epitaxy doped semiconductor material located atop the lower layer. The lower layer of the first epitaxy doped semiconductor material has a lower content of dopant as compared to the upper layer of the second epitaxy doped semiconductor material. The structure further includes at least one monolayer of dopant located within the upper layer of each of the embedded stressor elements. The at least one monolayer of dopant is in direct contact with an edge of either the source extension region or the drain extension region.

摘要翻译： 公开了在其中具有嵌入的应力元件的半导体结构。 所公开的结构包括位于半导体衬底的上表面上的至少一个FET栅极堆叠。 所述至少一个FET栅极堆叠包括在所述至少一个FET栅极堆叠中的覆盖区域处位于所述半导体衬底内的源极和漏极延伸区域。 器件沟道也存在于源极延伸区域和漏极延伸区域之间以及至少一个栅极堆叠层下方。 该结构还包括位于至少一个FET栅极堆叠的相对侧上并且位于半导体衬底内的嵌入式应力元件。 每个嵌入式应力元件包括第一外延掺杂半导体材料的下层，其具有不同于半导体衬底的晶格常数的晶格常数并且在器件沟道中施加应变，并且第二外延掺杂的上层 半导体材料位于下层的顶部。 与第二外延掺杂半导体材料的上层相比，第一外延掺杂半导体材料的下层具有较低的掺杂剂含量。 该结构还包括位于每个嵌入的应力元件的上层内的至少一层掺杂剂单层。 所述至少一个掺杂剂单层与源极延伸区域或漏极延伸区域的边缘直接接触。

公开(公告)号：US20110260213A1

公开(公告)日：2011-10-27

申请号：US12764329

申请日：2010-04-21

申请人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jinghong Li ,  Joseph S. Newbury ,  Viorel Ontalus ,  Dae-Gyu Park ,  Zhengmao Zhu

发明人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jinghong Li ,  Joseph S. Newbury ,  Viorel Ontalus ,  Dae-Gyu Park ,  Zhengmao Zhu

IPC分类号： H01L29/772 ,  H01L21/335

CPC分类号： H01L29/7848 ,  H01L21/823807 ,  H01L21/823814 ,  H01L29/165 ,  H01L29/6656 ,  H01L29/66636 ,  H01L29/7834

摘要： Semiconductor structures are disclosed that have embedded stressor elements therein. The disclosed structures include at least one FET gate stack located on an upper surface of a semiconductor substrate. The at least one FET gate stack includes source and drain extension regions located within the semiconductor substrate at a footprint of the at least one FET gate stack. A device channel is also present between the source and drain extension regions and beneath the at least one gate stack. The structure further includes embedded stressor elements located on opposite sides of the at least one FET gate stack and within the semiconductor substrate. Each of the embedded stressor elements includes a lower layer of a first epitaxy doped semiconductor material having a lattice constant that is different from a lattice constant of the semiconductor substrate and imparts a strain in the device channel, and an upper layer of a second epitaxy doped semiconductor material located atop the lower layer. The lower layer of the first epitaxy doped semiconductor material has a lower content of dopant as compared to the upper layer of the second epitaxy doped semiconductor material. The structure further includes at least one monolayer of dopant located within the upper layer of each of the embedded stressor elements. The at least one monolayer of dopant is in direct contact with an edge of either the source extension region or the drain extension region.

摘要翻译： 公开了在其中具有嵌入的应力元件的半导体结构。 所公开的结构包括位于半导体衬底的上表面上的至少一个FET栅极堆叠。 所述至少一个FET栅极堆叠包括在所述至少一个FET栅极堆叠中的覆盖区域处位于所述半导体衬底内的源极和漏极延伸区域。 器件沟道也存在于源极延伸区域和漏极延伸区域之间以及至少一个栅极堆叠层下方。 该结构还包括位于至少一个FET栅极堆叠的相对侧上并且位于半导体衬底内的嵌入式应力元件。 每个嵌入式应力元件包括第一外延掺杂半导体材料的下层，其具有不同于半导体衬底的晶格常数的晶格常数并且在器件沟道中施加应变，并且第二外延掺杂的上层 半导体材料位于下层的顶部。 与第二外延掺杂半导体材料的上层相比，第一外延掺杂半导体材料的下层具有较低的掺杂剂含量。 该结构还包括位于每个嵌入的应力元件的上层内的至少一层掺杂剂单层。 所述至少一个掺杂剂单层与源极延伸区域或漏极延伸区域的边缘直接接触。

公开(公告)号：US20120261717A1

公开(公告)日：2012-10-18

申请号：US13533499

申请日：2012-06-26

申请人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jinghong Li ,  Joseph S. Newbury ,  Viorel Ontalus ,  Dae-Gyu Park ,  Zhengmao Zhu

发明人： Kevin K. Chan ,  Abhishek Dube ,  Judson R. Holt ,  Jinghong Li ,  Joseph S. Newbury ,  Viorel Ontalus ,  Dae-Gyu Park ,  Zhengmao Zhu

IPC分类号： H01L27/092

CPC分类号： H01L29/7848 ,  H01L21/823807 ,  H01L21/823814 ,  H01L29/165 ,  H01L29/6656 ,  H01L29/66636 ,  H01L29/7834

摘要： Semiconductor structures are disclosed that include at least one FET gate stack located on a semiconductor substrate. The at least one FET gate stack includes source and drain extension regions located within the semiconductor substrate. A device channel is also present between the source and drain extension regions and beneath the at least one gate stack. Embedded stressor elements are located on opposite sides of the at least one FET gate stack and within the semiconductor substrate. Each stressor element includes a lower layer of a first epitaxy doped semiconductor material having a lattice constant that is different from a lattice constant of the semiconductor substrate and imparts a strain in the device channel, and an upper layer of a second epitaxy doped semiconductor material. At least one monolayer of dopant is located within the upper layer of each of the embedded stressor elements.

摘要翻译： 公开了包括位于半导体衬底上的至少一个FET栅叠层的半导体结构。 所述至少一个FET栅极堆叠包括位于半导体衬底内的源极和漏极延伸区域。 器件沟道也存在于源极延伸区域和漏极延伸区域之间以及至少一个栅极堆叠层下方。 嵌入式应力元件位于至少一个FET栅极堆叠的相对侧并且位于半导体衬底内。 每个应力元件包括第一外延掺杂半导体材料的下层，其具有不同于半导体衬底的晶格常数的晶格常数并且在器件沟道中施加应变，以及第二外延掺杂半导体材料的上层。 至少一个单层的掺杂剂位于每个嵌入的应力元件的上层内。

公开(公告)号：US08035141B2

公开(公告)日：2011-10-11

申请号：US12607104

申请日：2009-10-28

申请人： Kevin K. Chan ,  Abhishek Dube ,  Jinghong Li ,  Viorel Ontalus ,  Zhengmao Zhu

发明人： Kevin K. Chan ,  Abhishek Dube ,  Jinghong Li ,  Viorel Ontalus ,  Zhengmao Zhu

IPC分类号： H01L29/76

CPC分类号： H01L29/7848 ,  H01L29/165 ,  H01L29/66636 ,  H01L29/7834 ,  Y10S257/90 ,  Y10S257/902 ,  Y10S257/903

摘要： A semiconductor structure including a bi-layer nFET embedded stressor element is disclosed. The bi-layer nFET embedded stressor element can be integrated into any CMOS process flow. The bi-layer nFET embedded stressor element includes an implant damaged free first layer of a first epitaxy semiconductor material having a lattice constant that is different from a lattice constant of a semiconductor substrate and imparts a tensile strain in a device channel of an nFET gate stack. Typically, and when the semiconductor is composed of silicon, the first layer of the bi-layer nFET embedded stressor element is composed of Si:C. The bi-layer nFET embedded stressor element further includes a second layer of a second epitaxy semiconductor material that has a lower resistance to dopant diffusion than the first epitaxy semiconductor material. Typically, and when the semiconductor is composed of silicon, the second layer of the bi-layer nFET embedded stressor element is composed of silicon. Only the second layer of the bi-layer nFET embedded stressor element includes the implanted source/drain regions.

摘要翻译： 公开了一种包括双层nFET嵌入式应力元件的半导体结构。 双层nFET嵌入式应力元件可以集成到任何CMOS工艺流程中。 双层nFET嵌入式应力元件包括具有不同于半导体衬底的晶格常数的晶格常数的第一外延半导体材料的免费第一层的植入物，并且在nFET栅极堆叠的器件沟道中施加拉伸应变 。 通常，当半导体由硅组成时，双层nFET嵌入的应力元件的第一层由Si：C组成。 双层nFET嵌入式应力元件还包括具有比第一外延半导体材料更低的掺杂剂扩散阻力的第二外延半导体材料层。 通常，当半导体由硅组成时，双层nFET嵌入的应力元件的第二层由硅组成。 双层nFET嵌入式应力元件的第二层仅包括注入的源极/漏极区域。

公开(公告)号：US20110095343A1

公开(公告)日：2011-04-28

申请号：US12607104

申请日：2009-10-28

申请人： Kevin K. Chan ,  Abhishek Dube ,  Jinghong Li ,  Viorel Ontalus ,  Zhengmao Zhu

发明人： Kevin K. Chan ,  Abhishek Dube ,  Jinghong Li ,  Viorel Ontalus ,  Zhengmao Zhu

IPC分类号： H01L29/78 ,  H01L21/336

CPC分类号： H01L29/7848 ,  H01L29/165 ,  H01L29/66636 ,  H01L29/7834 ,  Y10S257/90 ,  Y10S257/902 ,  Y10S257/903

摘要： A semiconductor structure including a bi-layer nFET embedded stressor element is disclosed. The bi-layer nFET embedded stressor element can be integrated into any CMOS process flow. The bi-layer nFET embedded stressor element includes an implant damaged free first layer of a first epitaxy semiconductor material having a lattice constant that is different from a lattice constant of a semiconductor substrate and imparts a tensile strain in a device channel of an nFET gate stack. Typically, and when the semiconductor is composed of silicon, the first layer of the bi-layer nFET embedded stressor element is composed of Si:C. The bi-layer nFET embedded stressor element further includes a second layer of a second epitaxy semiconductor material that has a lower resistance to dopant diffusion than the first epitaxy semiconductor material. Typically, and when the semiconductor is composed of silicon, the second layer of the bi-layer nFET embedded stressor element is composed of silicon. Only the second layer of the bi-layer nFET embedded stressor element includes the implanted source/drain regions.

摘要翻译： 公开了一种包括双层nFET嵌入式应力元件的半导体结构。 双层nFET嵌入式应力元件可以集成到任何CMOS工艺流程中。 双层nFET嵌入式应力元件包括具有不同于半导体衬底的晶格常数的晶格常数的第一外延半导体材料的免费第一层的植入物，并且在nFET栅极堆叠的器件沟道中施加拉伸应变 。 通常，当半导体由硅组成时，双层nFET嵌入的应力元件的第一层由Si：C组成。 双层nFET嵌入式应力元件还包括具有比第一外延半导体材料更低的掺杂剂扩散阻力的第二外延半导体材料层。 通常，当半导体由硅组成时，双层nFET嵌入的应力元件的第二层由硅组成。 双层nFET嵌入式应力元件的第二层仅包括注入的源极/漏极区域。

公开(公告)号：US20120248436A1

公开(公告)日：2012-10-04

申请号：US13075450

申请日：2011-03-30

申请人： Abhishek Dube ,  Viorel Ontalus ,  Kathryn T. Schonenberg ,  Zhengmao Zhu

发明人： Abhishek Dube ,  Viorel Ontalus ,  Kathryn T. Schonenberg ,  Zhengmao Zhu

IPC分类号： H01L23/48 ,  H01L21/20

CPC分类号： H01L21/823425 ,  H01L21/02529 ,  H01L21/02576 ,  H01L21/823412 ,  H01L22/12 ,  H01L22/34 ,  H01L29/66636 ,  H01L29/7848

摘要： A semiconductor substrate having transistor structures and test structures with spacing between the transistor structures smaller than the spacing between the test structures is provided. A first iteratively performed deposition and etch process includes: depositing a first doped epitaxial layer having a first concentration of a dopant over the semiconductor substrate, and etching the first doped epitaxial layer. A second iteratively performed deposition and etch process includes: depositing a second doped epitaxial layer having a second concentration of the dopant higher than the first concentration over the semiconductor substrate, and etching the second doped epitaxial layer. The first concentration results in a first net growth rate over the transistor structures and the second concentration results in a lower, second net growth rate over the test structures than the transistor structures, resulting in reduced pattern loading.

摘要翻译： 提供了具有晶体管结构的半导体衬底和在晶体管结构之间具有小于测试结构之间的间隔的测试结构。 第一迭代执行的沉积和蚀刻工艺包括：在半导体衬底上沉积具有掺杂剂的第一浓度的第一掺杂外延层，并蚀刻第一掺杂外延层。 第二迭代进行的沉积和蚀刻工艺包括：在半导体衬底上沉积具有高于第一浓度的掺杂剂的第二浓度的第二掺杂外延层，并蚀刻第二掺杂外延层。 第一个浓度导致超过晶体管结构的第一净增长率，而第二浓度导致比晶体管结构高出测试结构的较低的第二净增长率，导致模式负载减小。

公开(公告)号：US08338279B2

公开(公告)日：2012-12-25

申请号：US13075450

申请日：2011-03-30

申请人： Abhishek Dube ,  Viorel Ontalus ,  Kathryn T. Schonenberg ,  Zhengmao Zhu

发明人： Abhishek Dube ,  Viorel Ontalus ,  Kathryn T. Schonenberg ,  Zhengmao Zhu

IPC分类号： H01L21/20

CPC分类号： H01L21/823425 ,  H01L21/02529 ,  H01L21/02576 ,  H01L21/823412 ,  H01L22/12 ,  H01L22/34 ,  H01L29/66636 ,  H01L29/7848

摘要： A semiconductor substrate having transistor structures and test structures with spacing between the transistor structures smaller than the spacing between the test structures is provided. A first iteratively performed deposition and etch process includes: depositing a first doped epitaxial layer having a first concentration of a dopant over the semiconductor substrate, and etching the first doped epitaxial layer. A second iteratively performed deposition and etch process includes: depositing a second doped epitaxial layer having a second concentration of the dopant higher than the first concentration over the semiconductor substrate, and etching the second doped epitaxial layer. The first concentration results in a first net growth rate over the transistor structures and the second concentration results in a lower, second net growth rate over the test structures than the transistor structures, resulting in reduced pattern loading.

摘要翻译： 提供了具有晶体管结构的半导体衬底和在晶体管结构之间具有小于测试结构之间的间隔的测试结构。 第一迭代执行的沉积和蚀刻工艺包括：在半导体衬底上沉积具有掺杂剂的第一浓度的第一掺杂外延层，并蚀刻第一掺杂外延层。 第二迭代进行的沉积和蚀刻工艺包括：在半导体衬底上沉积具有高于第一浓度的掺杂剂的第二浓度的第二掺杂外延层，并蚀刻第二掺杂外延层。 第一个浓度导致超过晶体管结构的第一净增长率，而第二浓度导致比晶体管结构高出测试结构的较低的第二净增长率，导致模式负载减小。