公开(公告)号：US20110175147A1

公开(公告)日：2011-07-21

申请号：US12690178

申请日：2010-01-20

申请人： Praneet Adusumilli ,  Alessandro Callegari ,  Josephine B. Chang ,  Changhwan Choi ,  Martin M. Frank ,  Michael A. Guillorn ,  Vijay Narayanan

发明人： Praneet Adusumilli ,  Alessandro Callegari ,  Josephine B. Chang ,  Changhwan Choi ,  Martin M. Frank ,  Michael A. Guillorn ,  Vijay Narayanan

IPC分类号： H01L29/78 ,  H01L21/28

CPC分类号： H01L29/4966 ,  H01L21/28088 ,  H01L29/513

摘要： A field effect transistor device and method which includes a semiconductor substrate, a dielectric gate layer, preferably a high dielectric constant gate layer, overlaying the semiconductor substrate and an electrically conductive oxygen barrier layer overlaying the gate dielectric layer. In one embodiment, there is a conductive layer between the gate dielectric layer and the oxygen barrier layer. In another embodiment, there is a low resistivity metal layer on the oxygen barrier layer.

摘要翻译： 一种场效应晶体管器件和方法，其包括覆盖半导体衬底的半导体衬底，介电栅极层，优选高介电常数栅极层和覆盖栅极电介质层的导电氧阻挡层。 在一个实施例中，在栅介质层和氧阻挡层之间存在导电层。 在另一个实施例中，在氧阻隔层上存在低电阻率金属层。

公开(公告)号：US07989902B2

公开(公告)日：2011-08-02

申请号：US12487248

申请日：2009-06-18

申请人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Vijay Narayanan

发明人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Vijay Narayanan

IPC分类号： H01L29/76 ,  H01L29/94 ,  H01L31/062 ,  H01L31/113 ,  H01L31/119

CPC分类号： H01L21/28088 ,  H01L29/4966 ,  H01L29/517 ,  H01L29/518 ,  H01L29/665 ,  H01L29/6659 ,  H01L29/7833

摘要： A stack of a high-k gate dielectric and a metal gate structure includes a lower metal layer, a scavenging metal layer, and an upper metal layer. The scavenging metal layer meets the following two criteria 1) a metal (M) for which the Gibbs free energy change of the reaction Si+2/y MxOy→2x/y M+SiO2 is positive 2) a metal that has a more negative Gibbs free energy per oxygen atom for formation of oxide than the material of the lower metal layer and the material of the upper metal layer. The scavenging metal layer meeting these criteria captures oxygen atoms as the oxygen atoms diffuse through the gate electrode toward the high-k gate dielectric. In addition, the scavenging metal layer remotely reduces the thickness of a silicon oxide interfacial layer underneath the high-k dielectric. As a result, the equivalent oxide thickness (EOT) of the total gate dielectric is reduced and the field effect transistor maintains a constant threshold voltage even after high temperature processes during CMOS integration.

摘要翻译： 高k栅极电介质和金属栅极结构的堆叠包括下部金属层，清除金属层和上部金属层。 清除金属层满足以下两个标准：1）反应Si + 2 / y MxOy→2x / y M + SiO2的吉布斯自由能变化为正的金属（M）2）具有更负的金属 每个氧原子吉布斯自由能用于形成氧化物，而不是下金属层的材料和上金属层的材料。 符合这些标准的清除金属层随着氧原子通过栅电极向高k栅极电介质扩散而捕获氧原子。 此外，清除金属层远远地降低了高k电介质下面的氧化硅界面层的厚度。 结果，即使在CMOS积分期间的高温处理之后，总栅极电介质的等效氧化物厚度（EOT）减小，并且场效应晶体管保持恒定的阈值电压。

公开(公告)号：US20120326314A1

公开(公告)日：2012-12-27

申请号：US13604959

申请日：2012-09-06

申请人： Stephen L. Brown ,  John Bruley ,  Cyril Cabral, JR. ,  Sandro Callegari ,  Martin M. Frank ,  Michael A. Guillorn ,  Marinus Hopstaken ,  Vijay Narayanan ,  Keith Kwong Hon Wong

发明人： Stephen L. Brown ,  John Bruley ,  Cyril Cabral, JR. ,  Sandro Callegari ,  Martin M. Frank ,  Michael A. Guillorn ,  Marinus Hopstaken ,  Vijay Narayanan ,  Keith Kwong Hon Wong

IPC分类号： H01L23/48 ,  H01L21/28

CPC分类号： H01L29/4966 ,  H01L21/28088 ,  H01L23/53266 ,  H01L29/517 ,  H01L2924/0002 ,  H01L2924/00

摘要： A layered structure and semiconductor device and methods for fabricating a layered structure and semiconductor device. The layered structure includes: a base layer including a material containing titanium nitride, tantalum nitride, or a combination thereof; a conductive layer including a material containing: tantalum aluminum nitride, titanium aluminum nitride, tantalum silicon nitride, titanium silicon nitride, tantalum hafnium nitride, titanium hafnium nitride, hafnium nitride, hafnium carbide, tantalum carbide, vanadium nitride, niobium nitride, or any combination thereof; and a tungsten layer. The semiconductor device includes: a semiconductor substrate; a base layer; a conductive layer; and a tungsten layer.

摘要翻译： 层状结构和半导体器件以及用于制造层状结构和半导体器件的方法。 层状结构包括：包含含有氮化钛，氮化钽或其组合的材料的基底层; 包括含有氮化铝钽，氮化铝钛，氮化硅氮化物，氮化钛，氮化钽，氮化钛，氮化铪，碳化铪，碳化钽，氮化钒，氮化铌或任何组合的材料的导电层 的; 和钨层。 半导体器件包括：半导体衬底; 基层; 导电层; 和钨层。

公开(公告)号：US20130032886A1

公开(公告)日：2013-02-07

申请号：US13195316

申请日：2011-08-01

申请人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Unoh Kwon ,  Vijay Narayanan

发明人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Unoh Kwon ,  Vijay Narayanan

IPC分类号： H01L27/092 ,  H01L21/8238

CPC分类号： H01L27/0922 ,  H01L21/823807 ,  H01L29/16 ,  H01L29/161 ,  H01L29/42364 ,  H01L29/4966 ,  H01L29/517

摘要： A structure has a semiconductor substrate and an nFET and a pFET disposed upon the substrate. The pFET has a semiconductor SiGe channel region formed upon or within a surface of the semiconductor substrate and a gate dielectric having an oxide layer overlying the channel region and a high-k dielectric layer overlying the oxide layer. A gate electrode overlies the gate dielectric and has a lower metal layer abutting the high-k layer, a scavenging metal layer abutting the lower metal layer, and an upper metal layer abutting the scavenging metal layer. The metal layer scavenges oxygen from the substrate (nFET) and SiGe (pFET) interface with the oxide layer resulting in an effective reduction in Tinv and Vt of the pFET, while scaling Tiny and maintaining Vt for the nFET, resulting in the Vt of the pFET becoming closer to the Vt of a similarly constructed nFET with scaled Tinv values.

摘要翻译： 结构具有半导体衬底以及设置在衬底上的nFET和pFET。 pFET具有形成在半导体衬底的表面上或其表面上的半导体SiGe沟道区，以及覆盖沟道区的氧化物层和覆盖氧化物层的高k电介质层的栅极电介质。 栅电极覆盖在栅极电介质上，并且具有邻接高k层的下金属层，邻接下金属层的清除金属层和与清除金属层邻接的上金属层。 金属层清除了衬底（nFET）中的氧和与氧化物层的SiGe（pFET）界面，导致pFET的Tinv和Vt有效降低，同时缩小Tiny并维持nFET的Vt，导致Vt pFET变得更接近具有缩放Tinv值的类似构造的nFET的Vt。

公开(公告)号：US20100320547A1

公开(公告)日：2010-12-23

申请号：US12487248

申请日：2009-06-18

申请人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Vijay Narayanan

发明人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Vijay Narayanan

IPC分类号： H01L29/78 ,  H01L21/314 ,  H01L21/336

CPC分类号： H01L21/28088 ,  H01L29/4966 ,  H01L29/517 ,  H01L29/518 ,  H01L29/665 ,  H01L29/6659 ,  H01L29/7833

摘要： A stack of a high-k gate dielectric and a metal gate structure includes a lower metal layer, a scavenging metal layer, and an upper metal layer. The scavenging metal layer meets the following two criteria 1) a metal (M) for which the Gibbs free energy change of the reaction Si+2/y MxOy→2x/y M+SiO2 is positive 2) a metal that has a more negative Gibbs free energy per oxygen atom for formation of oxide than the material of the lower metal layer and the material of the upper metal layer. The scavenging metal layer meeting these criteria captures oxygen atoms as the oxygen atoms diffuse through the gate electrode toward the high-k gate dielectric. In addition, the scavenging metal layer remotely reduces the thickness of a silicon oxide interfacial layer underneath the high-k dielectric. As a result, the equivalent oxide thickness (EOT) of the total gate dielectric is reduced and the field effect transistor maintains a constant threshold voltage even after high temperature processes during CMOS integration.

摘要翻译： 高k栅极电介质和金属栅极结构的堆叠包括下部金属层，清除金属层和上部金属层。 清除金属层满足以下两个标准：1）反应Si + 2 / y MxOy→2x / y M + SiO2的吉布斯自由能变化为正的金属（M）2）具有更负的金属 每个氧原子吉布斯自由能用于形成氧化物，而不是下金属层的材料和上金属层的材料。 符合这些标准的清除金属层随着氧原子通过栅电极向高k栅极电介质扩散而捕获氧原子。 此外，清除金属层远远地降低了高k电介质下面的氧化硅界面层的厚度。 结果，即使在CMOS积分期间的高温处理之后，总栅极电介质的等效氧化物厚度（EOT）减小，并且场效应晶体管保持恒定的阈值电压。

公开(公告)号：US20120228773A1

公开(公告)日：2012-09-13

申请号：US13042618

申请日：2011-03-08

申请人： Stephen L. Brown ,  John Bruley ,  Cyril Cabral, JR. ,  Sandro Callegari ,  Martin M. Frank ,  Michael A. Guillorn ,  Marinus Hopstaken ,  Vijay Narayanan ,  Keith Kwong Hon Wong

发明人： Stephen L. Brown ,  John Bruley ,  Cyril Cabral, JR. ,  Sandro Callegari ,  Martin M. Frank ,  Michael A. Guillorn ,  Marinus Hopstaken ,  Vijay Narayanan ,  Keith Kwong Hon Wong

IPC分类号： H01L23/48 ,  H01L21/28

CPC分类号： H01L29/4966 ,  H01L21/28088 ,  H01L23/53266 ,  H01L29/517 ,  H01L2924/0002 ,  H01L2924/00

摘要： A layered structure and semiconductor device and methods for fabricating a layered structure and semiconductor device. The layered structure includes: a base layer including a material containing titanium nitride, tantalum nitride, or a combination thereof; a conductive layer including a material containing: tantalum aluminum nitride, titanium aluminum nitride, tantalum silicon nitride, titanium silicon nitride, tantalum hafnium nitride, titanium hafnium nitride, hafnium nitride, hafnium carbide, tantalum carbide, vanadium nitride, niobium nitride, or any combination thereof; and a tungsten layer. The semiconductor device includes: a semiconductor substrate; a base layer; a conductive layer; and a tungsten layer.

公开(公告)号：US08367496B2

公开(公告)日：2013-02-05

申请号：US13099790

申请日：2011-05-03

申请人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Vijay Narayanan

发明人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Vijay Narayanan

IPC分类号： H01L21/8238

CPC分类号： H01L21/28088 ,  H01L29/4966 ,  H01L29/517 ,  H01L29/518 ,  H01L29/665 ,  H01L29/6659 ,  H01L29/7833

摘要： A stack of a high-k gate dielectric and a metal gate structure includes a lower metal layer, a scavenging metal layer, and an upper metal layer. The scavenging metal layer meets the following two criteria 1) a metal (M) for which the Gibbs free energy change of the reaction Si+2/y MxOy→2x/y M+SiO2 is positive 2) a metal that has a more negative Gibbs free energy per oxygen atom for formation of oxide than the material of the lower metal layer and the material of the upper metal layer. The scavenging metal layer meeting these criteria captures oxygen atoms as the oxygen atoms diffuse through the gate electrode toward the high-k gate dielectric. In addition, the scavenging metal layer remotely reduces the thickness of a silicon oxide interfacial layer underneath the high-k dielectric. As a result, the equivalent oxide thickness (EOT) of the total gate dielectric is reduced and the field effect transistor maintains a constant threshold voltage even after high temperature processes during CMOS integration.

摘要翻译： 高k栅极电介质和金属栅极结构的堆叠包括下部金属层，清除金属层和上部金属层。 清除金属层满足以下两个标准：1）反应Si + 2 / y MxOy→2x / y M + SiO2的吉布斯自由能变化为正的金属（M）2）具有更负的金属 每个氧原子吉布斯自由能用于形成氧化物，而不是下金属层的材料和上金属层的材料。 符合这些标准的清除金属层随着氧原子通过栅电极向高k栅极电介质扩散而捕获氧原子。 此外，清除金属层远远地降低了高k电介质下面的氧化硅界面层的厚度。 结果，即使在CMOS积分期间的高温处理之后，总栅极电介质的等效氧化物厚度（EOT）减小，并且场效应晶体管保持恒定的阈值电压。

公开(公告)号：US20110207280A1

公开(公告)日：2011-08-25

申请号：US13099790

申请日：2011-05-03

申请人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Vijay Narayanan

发明人： Takashi Ando ,  Changhwan Choi ,  Martin M. Frank ,  Vijay Narayanan

IPC分类号： H01L21/336

CPC分类号： H01L21/28088 ,  H01L29/4966 ,  H01L29/517 ,  H01L29/518 ,  H01L29/665 ,  H01L29/6659 ,  H01L29/7833

摘要： A stack of a high-k gate dielectric and a metal gate structure includes a lower metal layer, a scavenging metal layer, and an upper metal layer. The scavenging metal layer meets the following two criteria 1) a metal (M) for which the Gibbs free energy change of the reaction Si+2/y MxOy→2x/y M+SiO2 is positive 2) a metal that has a more negative Gibbs free energy per oxygen atom for formation of oxide than the material of the lower metal layer and the material of the upper metal layer. The scavenging metal layer meeting these criteria captures oxygen atoms as the oxygen atoms diffuse through the gate electrode toward the high-k gate dielectric. In addition, the scavenging metal layer remotely reduces the thickness of a silicon oxide interfacial layer underneath the high-k dielectric. As a result, the equivalent oxide thickness (EOT) of the total gate dielectric is reduced and the field effect transistor maintains a constant threshold voltage even after high temperature processes during CMOS integration.

摘要翻译： 高k栅极电介质和金属栅极结构的堆叠包括下部金属层，清除金属层和上部金属层。 清除金属层满足以下两个标准：1）反应Si + 2 / y MxOy→2x / y M + SiO2的吉布斯自由能变化为正的金属（M）2）具有更负的金属 每个氧原子吉布斯自由能用于形成氧化物，而不是下金属层的材料和上金属层的材料。 符合这些标准的清除金属层随着氧原子通过栅电极向高k栅极电介质扩散而捕获氧原子。 此外，清除金属层远远地降低了高k电介质下面的氧化硅界面层的厚度。 结果，即使在CMOS积分期间的高温处理之后，总栅极电介质的等效氧化物厚度（EOT）减小，并且场效应晶体管保持恒定的阈值电压。

公开(公告)号：US20120292677A1

公开(公告)日：2012-11-22

申请号：US13108340

申请日：2011-05-16

申请人： Catherine A. Dubourdieu ,  David J. Frank ,  Martin M. Frank ,  Vijay Narayanan ,  Paul M. Solomon ,  Thomas N. Theis

发明人： Catherine A. Dubourdieu ,  David J. Frank ,  Martin M. Frank ,  Vijay Narayanan ,  Paul M. Solomon ,  Thomas N. Theis

IPC分类号： H01L29/772

CPC分类号： H01L29/4232 ,  H01L29/42316 ,  H01L29/812

摘要： Ferroelectric semiconductor switching devices are provided, including field effect transistor (FET) devices having gate stack structures formed with a ferroelectric layer disposed between a gate contact and a thin conductive layer (“quantum conductive layer”) . The gate contact and ferroelectric layer serve to modulate an effective work function of the thin conductive layer. The thin conductive layer with the modulated work function is coupled to a semiconductor channel layer to modulate current flow through the semiconductor and achieve a steep sub-threshold slope.

摘要翻译： 提供了铁电半导体开关器件，包括具有栅极叠层结构的场效应晶体管（FET）器件，栅极堆叠结构形成有设置在栅极接触和薄导电层（量子导电层）之间的铁电层。 栅极接触和铁电层用于调制薄导电层的有效功函数。 具有调制功函数的薄导电层耦合到半导体沟道层，以调制通过半导体的电流，并实现陡峭的子阈值斜率。

公开(公告)号：US08212322B2

公开(公告)日：2012-07-03

申请号：US12720354

申请日：2010-03-09

申请人： Martin M. Frank ,  Arvind Kumar ,  Vijay Narayanan ,  Vamsi K. Paruchuri ,  Jeffrey Sleight

发明人： Martin M. Frank ,  Arvind Kumar ,  Vijay Narayanan ,  Vamsi K. Paruchuri ,  Jeffrey Sleight

IPC分类号： H01L21/8234 ,  H01L21/8244

CPC分类号： H01L27/1104 ,  H01L27/11 ,  H01L27/1108

摘要： Techniques for combining transistors having different threshold voltage requirements from one another are provided. In one aspect, a semiconductor device comprises a substrate having a first and a second nFET region, and a first and a second pFET region; a logic nFET on the substrate over the first nFET region; a logic pFET on the substrate over the first pFET region; a SRAM nFET on the substrate over the second nFET region; and a SRAM pFET on the substrate over the second pFET region, each comprising a gate stack having a metal layer over a high-K layer. The logic nFET gate stack further comprises a capping layer separating the metal layer from the high-K layer, wherein the capping layer is further configured to shift a threshold voltage of the logic nFET relative to a threshold voltage of one or more of the logic pFET, SRAM nFET and SRAM pFET.

摘要翻译： 提供了用于组合彼此具有不同阈值电压要求的晶体管的技术。 在一个方面，一种半导体器件包括具有第一和第二nFET区的衬底以及第一和第二pFET区; 在第一nFET区域上的衬底上的逻辑nFET; 在第一pFET区上的衬底上的逻辑pFET; 位于第二nFET区上的衬底上的SRAM nFET; 以及在第二pFET区上的衬底上的SRAM pFET，每个包括在高K层上具有金属层的栅极堆叠。 逻辑nFET栅极堆叠还包括将金属层与高K层分隔开的覆盖层，其中封盖层还被配置为相对于逻辑pFET中的一个或多个的阈值电压移动逻辑nFET的阈值电压 ，SRAM nFET和SRAM pFET。