公开(公告)号：US08785907B2

公开(公告)日：2014-07-22

申请号：US13722746

申请日：2012-12-20

申请人： Niti Goel ,  Niloy Mukherjee ,  Seung Hoon Sung ,  Van H. Le ,  Matthew V. Metz ,  Jack T. Kavalieros ,  Ravi Pillarisetty ,  Sanaz K. Gardner ,  Sansaptak Dasgupta ,  Willy Rachmady ,  Benjamin Chu-Kung ,  Marko Radosavljevic ,  Gilbert Dewey ,  Marc C. French ,  Jessica Kachian ,  Satyarth Suri ,  Robert S. Chau

发明人： Niti Goel ,  Niloy Mukherjee ,  Seung Hoon Sung ,  Van H. Le ,  Matthew V. Metz ,  Jack T. Kavalieros ,  Ravi Pillarisetty ,  Sanaz K. Gardner ,  Sansaptak Dasgupta ,  Willy Rachmady ,  Benjamin Chu-Kung ,  Marko Radosavljevic ,  Gilbert Dewey ,  Marc C. French ,  Jessica Kachian ,  Satyarth Suri ,  Robert S. Chau

IPC分类号： H01L29/06

CPC分类号： H01L21/764 ,  H01L21/02381 ,  H01L21/0245 ,  H01L21/02494 ,  H01L21/02507 ,  H01L21/02532 ,  H01L21/76232

摘要： An embodiment includes depositing a material onto a substrate where the material includes a different lattice constant than the substrate (e.g., III-V or IV epitaxial (EPI) material on a Si substrate). An embodiment includes an EPI layer formed within a trench having walls that narrow as the trench extends upwards. An embodiment includes an EPI layer formed within a trench using multiple growth temperatures. A defect barrier, formed in the EPI layer when the temperature changes, contains defects within the trench and below the defect barrier. The EPI layer above the defect barrier and within the trench is relatively defect free. An embodiment includes an EPI layer annealed within a trench to induce defect annihilation. An embodiment includes an EPI superlattice formed within a trench and covered with a relatively defect free EPI layer (that is still included in the trench). Other embodiments are described herein.

摘要翻译： 实施例包括将材料沉积到衬底上，其中材料包括与衬底（例如Si衬底上的III-V或IV外延（EPI）材料）不同的晶格常数。 一个实施例包括形成在沟槽内的EPI层，其具有随着沟槽向上延伸而变窄的壁。 实施例包括使用多个生长温度在沟槽内形成的EPI层。 当温度变化时，在EPI层中形成的缺陷屏障在沟槽内和缺陷屏障之下包含缺陷。 缺陷屏障之上和沟槽内的EPI层相对无缺陷。 一个实施方案包括在沟槽内退火以引发缺陷湮灭的EPI层。 一个实施例包括形成在沟槽内并覆盖有相对无缺陷的EPI层（仍包含在沟槽中）的EPI超晶格。 本文描述了其它实施例。

公开(公告)号：US20140084239A1

公开(公告)日：2014-03-27

申请号：US13629148

申请日：2012-09-27

申请人： Marko Radosavljevic ,  Gilbert Dewey ,  Benjamin Chu-Kung ,  Dipanjan Basu ,  Sanaz K. Gardner ,  Satyarth Suri ,  Ravi Pillarisetty ,  Niloy Mukherjee ,  Han Wui Then ,  Robert S. Chau

发明人： Marko Radosavljevic ,  Gilbert Dewey ,  Benjamin Chu-Kung ,  Dipanjan Basu ,  Sanaz K. Gardner ,  Satyarth Suri ,  Ravi Pillarisetty ,  Niloy Mukherjee ,  Han Wui Then ,  Robert S. Chau

IPC分类号： H01L29/78 ,  H01L29/267 ,  H01L29/06

CPC分类号： H01L29/0665 ,  B82Y10/00 ,  B82Y40/00 ,  H01L29/0673 ,  H01L29/068 ,  H01L29/201 ,  H01L29/401 ,  H01L29/42392 ,  H01L29/66469 ,  H01L29/775 ,  H01L29/785 ,  H01L29/78696 ,  H01L2924/0002 ,  H01L2924/00

摘要： Non-planar semiconductor devices having channel regions with low band-gap cladding layers are described. For example, a semiconductor device includes a vertical arrangement of a plurality of nanowires disposed above a substrate. Each nanowire includes an inner region having a first band gap and an outer cladding layer surrounding the inner region. The cladding layer has a second, lower band gap. A gate stack is disposed on and completely surrounds the channel region of each of the nanowires. The gate stack includes a gate dielectric layer disposed on and surrounding the cladding layer and a gate electrode disposed on the gate dielectric layer. Source and drain regions are disposed on either side of the channel regions of the nanowires.

摘要翻译： 描述具有低带隙包层的沟道区的非平面半导体器件。 例如，半导体器件包括布置在衬底上方的多个纳米线的垂直布置。 每个纳米线包括具有第一带隙的内部区域和围绕内部区域的外部包层。 包层具有第二较低带隙。 栅堆叠设置在每个纳米线的沟道区上并完全包围。 栅极堆叠包括设置在包层上并围绕着包层的栅极电介质层和设置在栅极介电层上的栅电极。 源区和漏区设置在纳米线的沟道区的两侧。

公开(公告)号：US20150206796A1

公开(公告)日：2015-07-23

申请号：US14162717

申请日：2014-01-23

申请人： Sansaptak Dasgupta ,  Han Wui Then ,  Sanaz K. Gardner ,  Seung Hoon Sung ,  Marko Radosavljevic ,  Benjamin Chu-Kung ,  Sherry R. Taft ,  Ravi Pillarisetty ,  Robert S. Chau

发明人： Sansaptak Dasgupta ,  Han Wui Then ,  Sanaz K. Gardner ,  Seung Hoon Sung ,  Marko Radosavljevic ,  Benjamin Chu-Kung ,  Sherry R. Taft ,  Ravi Pillarisetty ,  Robert S. Chau

IPC分类号： H01L21/768 ,  H01L21/762 ,  H01L21/02

CPC分类号： H01L29/2003 ,  H01L21/02381 ,  H01L21/02458 ,  H01L21/0254 ,  H01L21/02639 ,  H01L21/02647 ,  H01L21/76229 ,  H01L21/76232 ,  H01L21/8258 ,  H01L29/045 ,  H01L29/0649 ,  H01L29/0684

摘要： A trench comprising a portion of a substrate is formed. A nucleation layer is deposited on the portion of the substrate within the trench. A III-N material layer is deposited on the nucleation layer. The III-N material layer is laterally grown over the trench. A device layer is deposited on the laterally grown III-N material layer. A low defect density region is obtained on the laterally grown material and is used for electronic device fabrication of III-N materials on Si substrates.

摘要翻译： 形成包括基板的一部分的沟槽。 成核层沉积在沟槽内的衬底部分上。 在成核层上沉积III-N材料层。 在沟槽上横向生长III-N材料层。 器件层沉积在横向生长的III-N材料层上。 在横向生长的材料上获得低缺陷密度区域，并用于Si衬底上的III-N材料的电子器件制造。

公开(公告)号：US20150187924A1

公开(公告)日：2015-07-02

申请号：US14141304

申请日：2013-12-26

申请人： Sansaptak Dasgupta ,  Han Wui Then ,  Marko Radosavljevic ,  Sanaz K. Gardner ,  Seung Hoon Sung ,  Benjamin Chu-Kung ,  Robert S. Chau

发明人： Sansaptak Dasgupta ,  Han Wui Then ,  Marko Radosavljevic ,  Sanaz K. Gardner ,  Seung Hoon Sung ,  Benjamin Chu-Kung ,  Robert S. Chau

IPC分类号： H01L29/778 ,  H01L21/306 ,  H01L29/66

CPC分类号： H01L29/7783 ,  H01L21/30612 ,  H01L21/30617 ,  H01L29/155 ,  H01L29/2003 ,  H01L29/4236 ,  H01L29/66462 ,  H01L29/7786

摘要： Transistors or transistor layers include an InAlN and AlGaN bi-layer capping stack on a 2DEG GaN channel, such as for GaN MOS structures on Si substrates. The GaN channel may be formed in a GaN buffer layer or stack, to compensate for the high crystal structure lattice size and coefficient of thermal expansion mismatch between GaN and Si. The bi-layer capping stack an upper InAlN layer on a lower AlGaN layer to induce charge polarization in the channel, compensate for poor composition uniformity (e.g., of Al), and compensate for rough surface morphology of the bottom surface of the InAlN material. It may lead to a sheet resistance between 250 and 350 ohms/sqr. It may also reduce bowing of the GaN on Si wafers during growth of the layer of InAlN material, and provide a AlGaN setback layer for etching the InAlN layer in the gate region.

摘要翻译： 晶体管或晶体管层包括2DEG GaN沟道上的InAlN和AlGaN双层封装叠层，例如用于Si衬底上的GaN MOS结构。 GaN沟道可以形成在GaN缓冲层或堆叠中，以补偿GaN和Si之间的高晶格结构晶格尺寸和热膨胀失配系数。 双层封装在下AlGaN层上堆叠上InAlN层以在沟道中引起电荷极化，补偿较差的组成均匀性（例如Al），并补偿InAlN材料的底表面的粗糙表面形态。 它可能导致250和350欧姆/ sqr之间的薄层电阻。 还可以在InAlN材料层的生长期间减少Si晶片上的GaN的弯曲，并且提供用于蚀刻栅极区域中的InAlN层的AlGaN回填层。

公开(公告)号：US08768271B1

公开(公告)日：2014-07-01

申请号：US13720852

申请日：2012-12-19

申请人： Han Wui Then ,  Sansaptak Dasgupta ,  Marko Radosavljevic ,  Benjamin Chu-Kung ,  Sanaz K. Gardner ,  Seung Hoon Sung ,  Robert S. Chau

发明人： Han Wui Then ,  Sansaptak Dasgupta ,  Marko Radosavljevic ,  Benjamin Chu-Kung ,  Sanaz K. Gardner ,  Seung Hoon Sung ,  Robert S. Chau

IPC分类号： H04B1/04 ,  H01L29/772

CPC分类号： H01L29/2003 ,  H01L21/02164 ,  H01L21/02238 ,  H01L21/02255 ,  H01L21/0228 ,  H01L21/0254 ,  H01L21/283 ,  H01L21/28575 ,  H01L21/84 ,  H01L27/1203 ,  H01L29/0649 ,  H01L29/201 ,  H01L29/42356 ,  H01L29/66462 ,  H01L29/66795 ,  H01L29/7787 ,  H01L29/78 ,  H01L29/785 ,  H01L29/7851 ,  H01L29/802

摘要： A III-N semiconductor channel is formed on a III-N transition layer formed on a (111) or (110) surface of a silicon template structure, such as a fin sidewall. In embodiments, the silicon fin has a width comparable to the III-N epitaxial film thicknesses for a more compliant seeding layer, permitting lower defect density and/or reduced epitaxial film thickness. In embodiments, a transition layer is GaN and the semiconductor channel comprises Indium (In) to increase a conduction band offset from the silicon fin. In other embodiments, the fin is sacrificial and either removed or oxidized, or otherwise converted into a dielectric structure during transistor fabrication. In certain embodiments employing a sacrificial fin, the III-N transition layer and semiconductor channel is substantially pure GaN, permitting a breakdown voltage higher than would be sustainable in the presence of the silicon fin.

摘要翻译： III-N半导体沟道形成在形成于诸如翅片侧壁的硅模板结构的（111）或（110）表面上的III-N过渡层上。 在实施例中，硅鳍具有与更适应的种子层的III-N外延膜厚度相当的宽度，允许更低的缺陷密度和/或降低的外延膜厚度。 在实施例中，过渡层是GaN，并且半导体沟道包括铟（In）以增加从硅片的导带偏移。 在其它实施例中，鳍是牺牲性的，并且在晶体管制造期间被去除或氧化，或以其它方式转换为电介质结构。 在采用牺牲散热片的某些实施例中，III-N过渡层和半导体通道是基本上纯的GaN，允许击穿电压高于在硅片存在时可持续的击穿电压。

公开(公告)号：US20140175515A1

公开(公告)日：2014-06-26

申请号：US13725546

申请日：2012-12-21

申请人： Han Wui THEN ,  Sansaptak DASGUPTA ,  Marko RADOSAVLJEVIC ,  Benjamin CHU-KUNG ,  Seung Hoon SUNG ,  Sanaz K. GARDNER ,  Robert S. CHAU

发明人： Han Wui THEN ,  Sansaptak DASGUPTA ,  Marko RADOSAVLJEVIC ,  Benjamin CHU-KUNG ,  Seung Hoon SUNG ,  Sanaz K. GARDNER ,  Robert S. CHAU

IPC分类号： H01L29/772 ,  H01L29/66

CPC分类号： H01L29/78696 ,  H01L21/02387 ,  H01L21/02389 ,  H01L21/02433 ,  H01L21/02458 ,  H01L21/0251 ,  H01L21/02538 ,  H01L21/0254 ,  H01L29/045 ,  H01L29/0673 ,  H01L29/2003 ,  H01L29/205 ,  H01L29/42392 ,  H01L29/66409 ,  H01L29/66522 ,  H01L29/66742 ,  H01L29/772 ,  H01L29/785 ,  H01L29/78681

摘要： A III-N semiconductor channel is compositionally graded between a transition layer and a III-N polarization layer. In embodiments, a gate stack is deposited over sidewalls of a fin including the graded III-N semiconductor channel allowing for formation of a transport channel in the III-N semiconductor channel adjacent to at least both sidewall surfaces in response to a gate bias voltage. In embodiments, a gate stack is deposited completely around a nanowire including a III-N semiconductor channel compositionally graded to enable formation of a transport channel in the III-N semiconductor channel adjacent to both the polarization layer and the transition layer in response to a gate bias voltage.

摘要翻译： III-N半导体通道在过渡层和III-N偏振层之间组成分级。 在实施例中，栅堆叠沉积在包括渐变III-N半导体沟道的鳍的侧壁上，允许在响应于栅极偏置电压的至少两个侧壁表面相邻的III-N半导体沟道中形成传输沟道。 在实施例中，栅极叠层完全沉积在包括III-N半导体沟道的纳米线周围，该纳米线被组成分级，以使得能够响应于栅极形成与偏振层和过渡层两者相邻的III-N半导体沟道中的传输沟道 偏压。

公开(公告)号：US20140170998A1

公开(公告)日：2014-06-19

申请号：US13720852

申请日：2012-12-19

申请人： Han Wui THEN ,  Sansaptak DASGUPTA ,  Marko RADOSAVLJEVIC ,  Benjamin CHU-KUNG ,  Sanaz K. GARDNER ,  Seung Hoon SUNG ,  Robert S. CHAU

发明人： Han Wui THEN ,  Sansaptak DASGUPTA ,  Marko RADOSAVLJEVIC ,  Benjamin CHU-KUNG ,  Sanaz K. GARDNER ,  Seung Hoon SUNG ,  Robert S. CHAU

IPC分类号： H01L29/80 ,  H01L29/66 ,  H01L29/20

CPC分类号： H01L29/2003 ,  H01L21/02164 ,  H01L21/02238 ,  H01L21/02255 ,  H01L21/0228 ,  H01L21/0254 ,  H01L21/283 ,  H01L21/28575 ,  H01L21/84 ,  H01L27/1203 ,  H01L29/0649 ,  H01L29/201 ,  H01L29/42356 ,  H01L29/66462 ,  H01L29/66795 ,  H01L29/7787 ,  H01L29/78 ,  H01L29/785 ,  H01L29/7851 ,  H01L29/802

摘要： A III-N semiconductor channel is formed on a III-N transition layer formed on a (111) or (110) surface of a silicon template structure, such as a fin sidewall. In embodiments, the silicon fin has a width comparable to the III-N epitaxial film thicknesses for a more compliant seeding layer, permitting lower defect density and/or reduced epitaxial film thickness. In embodiments, a transition layer is GaN and the semiconductor channel comprises Indium (In) to increase a conduction band offset from the silicon fin. In other embodiments, the fin is sacrificial and either removed or oxidized, or otherwise converted into a dielectric structure during transistor fabrication. In certain embodiments employing a sacrificial fin, the III-N transition layer and semiconductor channel is substantially pure GaN, permitting a breakdown voltage higher than would be sustainable in the presence of the silicon fin.

公开(公告)号：US08896101B2

公开(公告)日：2014-11-25

申请号：US13725546

申请日：2012-12-21

申请人： Han Wui Then ,  Sansaptak Dasgupta ,  Marko Radosavljevic ,  Benjamin Chu-Kung ,  Seung Hoon Sung ,  Sanaz K. Gardner ,  Robert S. Chau

发明人： Han Wui Then ,  Sansaptak Dasgupta ,  Marko Radosavljevic ,  Benjamin Chu-Kung ,  Seung Hoon Sung ,  Sanaz K. Gardner ,  Robert S. Chau

IPC分类号： H01L29/20 ,  H01L29/772 ,  H01L29/66

CPC分类号： H01L29/78696 ,  H01L21/02387 ,  H01L21/02389 ,  H01L21/02433 ,  H01L21/02458 ,  H01L21/0251 ,  H01L21/02538 ,  H01L21/0254 ,  H01L29/045 ,  H01L29/0673 ,  H01L29/2003 ,  H01L29/205 ,  H01L29/42392 ,  H01L29/66409 ,  H01L29/66522 ,  H01L29/66742 ,  H01L29/772 ,  H01L29/785 ,  H01L29/78681

摘要： A III-N semiconductor channel is compositionally graded between a transition layer and a III-N polarization layer. In embodiments, a gate stack is deposited over sidewalls of a fin including the graded III-N semiconductor channel allowing for formation of a transport channel in the III-N semiconductor channel adjacent to at least both sidewall surfaces in response to a gate bias voltage. In embodiments, a gate stack is deposited completely around a nanowire including a III-N semiconductor channel compositionally graded to enable formation of a transport channel in the III-N semiconductor channel adjacent to both the polarization layer and the transition layer in response to a gate bias voltage.

摘要翻译： III-N半导体通道在过渡层和III-N偏振层之间组成分级。 在实施例中，栅堆叠沉积在包括渐变III-N半导体沟道的鳍的侧壁上，允许在响应于栅极偏置电压的至少两个侧壁表面相邻的III-N半导体沟道中形成传输沟道。 在实施例中，栅极叠层完全沉积在包括III-N半导体沟道的纳米线周围，该纳米线被组成分级，以使得能够响应于栅极形成与偏振层和过渡层两者相邻的III-N半导体沟道中的传输沟道 偏压。

公开(公告)号：US08785909B2

公开(公告)日：2014-07-22

申请号：US13629148

申请日：2012-09-27

申请人： Marko Radosavljevic ,  Gilbert Dewey ,  Benjamin Chu-Kung ,  Dipanjan Basu ,  Sanaz K. Gardner ,  Satyarth Suri ,  Ravi Pillarisetty ,  Niloy Mukherjee ,  Han Wui Then ,  Robert S. Chau

发明人： Marko Radosavljevic ,  Gilbert Dewey ,  Benjamin Chu-Kung ,  Dipanjan Basu ,  Sanaz K. Gardner ,  Satyarth Suri ,  Ravi Pillarisetty ,  Niloy Mukherjee ,  Han Wui Then ,  Robert S. Chau

IPC分类号： H01L29/06 ,  B82Y10/00 ,  H01L29/78

CPC分类号： H01L29/0665 ,  B82Y10/00 ,  B82Y40/00 ,  H01L29/0673 ,  H01L29/068 ,  H01L29/201 ,  H01L29/401 ,  H01L29/42392 ,  H01L29/66469 ,  H01L29/775 ,  H01L29/785 ,  H01L29/78696 ,  H01L2924/0002 ,  H01L2924/00

摘要： Non-planar semiconductor devices having channel regions with low band-gap cladding layers are described. For example, a semiconductor device includes a vertical arrangement of a plurality of nanowires disposed above a substrate. Each nanowire includes an inner region having a first band gap and an outer cladding layer surrounding the inner region. The cladding layer has a second, lower band gap. A gate stack is disposed on and completely surrounds the channel region of each of the nanowires. The gate stack includes a gate dielectric layer disposed on and surrounding the cladding layer and a gate electrode disposed on the gate dielectric layer. Source and drain regions are disposed on either side of the channel regions of the nanowires.

摘要翻译： 描述具有低带隙包层的沟道区的非平面半导体器件。 例如，半导体器件包括布置在衬底上方的多个纳米线的垂直布置。 每个纳米线包括具有第一带隙的内部区域和围绕内部区域的外部包层。 包层具有第二较低带隙。 栅堆叠设置在每个纳米线的沟道区上并完全包围。 栅极堆叠包括设置在包层上并围绕着包层的栅极电介质层和设置在栅极介电层上的栅电极。 源区和漏区设置在纳米线的沟道区的两侧。