公开(公告)号：US08877600B2

公开(公告)日：2014-11-04

申请号：US14104903

申请日：2013-12-12

Applicant: STMicroelectronics (Crolles 2) SAS ,  STMicroelectronics S.A. ,  STMicroelectronics, Inc. ,  Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Inventor： Claire Fenouillet-Beranger ,  Stephane Denorme ,  Nicolas Loubet ,  Qing Liu ,  Emmanuel Richard ,  Pierre Perreau

IPC: H01L21/20 ,  H01L21/762

CPC classification number: H01L21/76283 ,  H01L21/84 ,  H01L27/1207

Abstract: A method for manufacturing a hybrid SOI/bulk substrate, including the steps of starting from an SOI wafer comprising a single-crystal semiconductor layer called SOI layer, on an insulating layer, on a single-crystal semiconductor substrate; depositing on the SOI layer at least one masking layer and forming openings crossing the masking layer, the SOI layer, and the insulating layer, to reach the substrate; growing by a repeated alternation of selective epitaxy and partial etching steps a semiconductor material; and etching insulating trenches surrounding said openings filled with semiconductor material, while encroaching inwards over the periphery of the openings.

Abstract translation: 一种制造混合SOI /体基板的方法，包括以下步骤：在绝缘层上在单晶半导体衬底上从包括称为SOI层的单晶半导体层的SOI晶片开始; 在SOI层上沉积至少一个掩模层，并形成与掩模层，SOI层和绝缘层交叉的开口，以到达衬底; 通过选择性外延和部分蚀刻步骤的重复交替生长半导体材料; 以及蚀刻围绕填充有半导体材料的所述开口的绝缘沟槽，同时在开口的周边向内侵入。

公开(公告)号：US08860123B1

公开(公告)日：2014-10-14

申请号：US13852720

申请日：2013-03-28

Applicant: STMicroelectronics, Inc. ,  International Business Machines Corporation

Inventor： Prasanna Khare ,  Stephane Allegret-Maret ,  Nicolas Loubet ,  Qing Liu ,  Hemanth Jagannathan ,  Lisa Edge ,  Kangguo Cheng ,  Bruce Doris

IPC: H01L29/792 ,  H01L21/8238 ,  H01L29/423 ,  H01L29/66

CPC classification number: H01L29/792 ,  H01L21/28273 ,  H01L27/11546 ,  H01L29/42324 ,  H01L29/66825 ,  H01L29/7881

Abstract: A memory device may include a semiconductor substrate, and a memory transistor in the semiconductor substrate. The memory transistor may include source and drain regions in the semiconductor substrate and a channel region therebetween, and a gate stack having a first dielectric layer over the channel region, a second dielectric layer over the first dielectric layer, a first diffusion barrier layer over the second dielectric layer, a first electrically conductive layer over the first diffusion barrier layer, a second diffusion barrier layer over the first electrically conductive layer, and a second electrically conductive layer over the second diffusion barrier layer. The first and second dielectric layers may include different dielectric materials, and the first diffusion barrier layer may be thinner than the second diffusion barrier layer.

Abstract translation: 存储器件可以包括半导体衬底和半导体衬底中的存储晶体管。 存储晶体管可以包括半导体衬底中的源极和漏极区域以及它们之间的沟道区域，以及栅极堆叠，其在沟道区域上具有第一介电层，在第一介电层上方具有第二介电层，第一扩散阻挡层 第一介电层，第一扩散阻挡层上的第一导电层，第一导电层上的第二扩散阻挡层，以及第二扩散阻挡层上的第二导电层。 第一和第二电介质层可以包括不同的电介质材料，并且第一扩散阻挡层可以比第二扩散阻挡层薄。

公开(公告)号：US20140170834A1

公开(公告)日：2014-06-19

申请号：US14104903

申请日：2013-12-12

Applicant: STMicroelectronics (Crolles 2) SAS ,  Commissariat à l'Énergie Atomique et aux Énergies Alternatives ,  STMicroelectronics, Inc. ,  STMicroelectronics S.A.

Inventor： Claire Fenouillet-Beranger ,  Stephane Denorme ,  Nicolas Loubet ,  Qing Liu ,  Emmanuel Richard ,  Pierre Perreau

IPC: H01L21/762

CPC classification number: H01L21/76283 ,  H01L21/84 ,  H01L27/1207

Abstract: A method for manufacturing a hybrid SOI/bulk substrate, including the steps of starting from an SOI wafer comprising a single-crystal semiconductor layer called SOI layer, on an insulating layer, on a single-crystal semiconductor substrate; depositing on the SOI layer at least one masking layer and forming openings crossing the masking layer, the SOI layer, and the insulating layer, to reach the substrate; growing by a repeated alternation of selective epitaxy and partial etching steps a semiconductor material; and etching insulating trenches surrounding said openings filled with semiconductor material, while encroaching inwards over the periphery of the openings.

Abstract translation: 一种制造混合SOI /体基板的方法，包括以下步骤：在绝缘层上在单晶半导体衬底上从包括称为SOI层的单晶半导体层的SOI晶片开始; 在SOI层上沉积至少一个掩模层，并形成与掩模层，SOI层和绝缘层交叉的开口，以到达衬底; 通过选择性外延和部分蚀刻步骤的重复交替生长半导体材料; 以及蚀刻围绕填充有半导体材料的所述开口的绝缘沟槽，同时在开口的周边向内侵入。

公开(公告)号：US20140099769A1

公开(公告)日：2014-04-10

申请号：US13647986

申请日：2012-10-09

Applicant: STMICROELECTRONICS, INC. ,  INTERNATIONAL BUSINESS MACHINES CORP.

Inventor： Nicolas Loubet ,  Qing Liu ,  Shom Ponoth

IPC: H01L21/762

CPC classification number: H01L21/76283 ,  H01L21/31111 ,  H01L21/76232 ,  H01L21/84

Abstract: Isolation trenches are etched through an active silicon layer overlying a buried oxide on a substrate into the substrate, and through any pad dielectric(s) on the active silicon layer. Lateral epitaxial growth of the active silicon layer forms protrusions into the isolation trenches to a lateral distance of at least about 5 nanometers, and portions of the isolation trenches around the protrusions are filled with dielectric. Raised source/drain regions are formed on portions of the active silicon layer including a dielectric. As a result, misaligned contacts passing around edges of the raised source/drain regions remain spaced apart from sidewalls of the substrate in the isolation trenches.

Abstract translation: 通过将衬底上的掩埋氧化物覆盖在衬底中以及通过有源硅层上的任何焊盘电介质的有源硅层蚀刻隔离沟槽。 有源硅层的横向外延生长在隔离沟槽中形成至少约5纳米的横向距离的突起，并且围绕突起的部分隔离沟槽被电介质填充。 在包括电介质的有源硅层的部分上形成凸起的源极/漏极区。 结果，穿过凸起的源极/漏极区域的边缘的不对准触点保持与隔离沟槽中的衬底的侧壁间隔开。

公开(公告)号：US10580771B2

公开(公告)日：2020-03-03

申请号：US16049685

申请日：2018-07-30

Applicant: STMICROELECTRONICS, INC.

Inventor： Qing Liu ,  Prasanna Khare ,  Nicolas Loubet

IPC: H01L21/84 ,  H01L29/66 ,  H01L29/78 ,  H01L21/8238 ,  H01L27/088 ,  H01L29/08 ,  H01L21/265 ,  H01L29/417 ,  H01L21/225 ,  H01L21/8234

Abstract: A multi-fin FINFET device may include a substrate and a plurality of semiconductor fins extending upwardly from the substrate and being spaced apart along the substrate. Each semiconductor fin may have opposing first and second ends and a medial portion therebetween, and outermost fins of the plurality of semiconductor fins may comprise an epitaxial growth barrier on outside surfaces thereof. The FINFET may further include at least one gate overlying the medial portions of the semiconductor fins, a plurality of raised epitaxial semiconductor source regions between the semiconductor fins adjacent the first ends thereof, and a plurality of raised epitaxial semiconductor drain regions between the semiconductor fins adjacent the second ends thereof.

公开(公告)号：US10483393B2

公开(公告)日：2019-11-19

申请号：US15798976

申请日：2017-10-31

Applicant: STMicroelectronics, Inc.

Inventor： Nicolas Loubet ,  Pierre Morin

IPC: H01L27/088 ,  H01L29/78 ,  H01L29/66 ,  H01L29/10 ,  H01L29/165 ,  H01L29/15 ,  H01L29/16 ,  H01L29/161

Abstract: Methods and structures for forming strained-channel finFETs are described. Fin structures for finFETs may be formed in two epitaxial layers that are grown over a bulk substrate. A first thin epitaxial layer may be cut and used to impart strain to an adjacent channel region of the finFET via elastic relaxation. The structures exhibit a preferred design range for increasing induced strain and uniformity of the strain over the fin height.

公开(公告)号：US10199392B2

公开(公告)日：2019-02-05

申请号：US15169462

申请日：2016-05-31

Applicant: STMicroelectronics, Inc.

Inventor： Ronald K. Sampson ,  Nicolas Loubet

IPC: H01L27/14 ,  H01L27/12 ,  H01L29/78 ,  H01L29/66 ,  H01L21/84 ,  H01L29/06 ,  H01L21/02 ,  H01L21/28 ,  H01L29/10 ,  H01L21/265 ,  H01L21/308 ,  H01L29/167 ,  H01L29/49

Abstract: A semiconductor material is patterned to define elongated fins insulated from an underlying substrate. A polysilicon semiconductor material is deposited over and in between the elongated fins, and is patterned to define elongated gates extending to perpendicularly cross over the elongated fins at a transistor channel. Sidewall spacers are formed on side walls of the elongated gates. Portions of the elongated fins located between the elongated gates are removed, along with the underlying insulation, to expose the underlying substrate. One or more semiconductor material layers are then epitaxially grown from the underlying substrate at locations between the elongated gates. The one or more semiconductor material layers may include an undoped epi-layer and an overlying doped epi-layer. The epitaxial material defines a source or drain of the transistor.

公开(公告)号：US10170546B2

公开(公告)日：2019-01-01

申请号：US15873644

申请日：2018-01-17

Applicant: STMICROELECTRONICS, INC.

Inventor： Nicolas Loubet ,  Prasanna Khare

IPC: H01L31/072 ,  H01L29/06 ,  H01L21/762 ,  H01L21/8234 ,  H01L27/088 ,  H01L29/16 ,  H01L29/49 ,  H01L21/02 ,  H01L21/3065 ,  H01L21/308 ,  H01L21/3105 ,  H01L29/08 ,  H01L29/165 ,  H01L29/66 ,  H01L29/78

Abstract: Channel-to-substrate leakage in a FinFET device is prevented by inserting an insulating layer between the semiconducting channel and the substrate during fabrication of the device. Similarly, source/drain-to-substrate leakage in a FinFET device is prevented by isolating the source/drain regions from the substrate by inserting an insulating layer between the source/drain regions and the substrate. Forming such an insulating layer isolates the conduction path from the substrate both physically and electrically, thus preventing current leakage. In an array of semiconducting fins made up of a multi-layer stack, the bottom material is removed thus yielding a fin array that is suspended above the silicon surface. A resulting gap underneath the remaining top fin material is then filled with oxide to better support the fins and to isolate the array of fins from the substrate.

公开(公告)号：US10074577B2

公开(公告)日：2018-09-11

申请号：US15220150

申请日：2016-07-26

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  STMicroelectronics, Inc.

Inventor： Hong He ,  James Kuss ,  Nicolas Loubet ,  Junli Wang

IPC: H01L21/84 ,  H01L21/8238 ,  H01L21/02 ,  H01L21/306 ,  H01L21/324 ,  H01L27/092 ,  H01L27/12 ,  H01L29/161

CPC classification number: H01L21/845 ,  H01L21/0217 ,  H01L21/02532 ,  H01L21/30604 ,  H01L21/324 ,  H01L21/823821 ,  H01L21/823857 ,  H01L21/823864 ,  H01L21/823878 ,  H01L27/0924 ,  H01L27/1211 ,  H01L29/161

Abstract: A method for forming fins includes growing a SiGe layer and a silicon layer over a surface of a bulk Si substrate, patterning fin structures from the silicon layer and the SiGe layer and filling between the fin structures with a dielectric fill. Trenches are formed to expose end portions of the fin structures. A first region of the fin structures is blocked off. The SiGe layer of the fin structures of a second region is removed by selectively etching the fin structures from the end portions to form voids, which are filled with dielectric material. The silicon layer of the fin structures is exposed. The SiGe layer in the first region is thermally oxidized to drive Ge into the silicon layer to form SiGe fins on an oxide layer in the first region and silicon fins on the dielectric material in the second region.

公开(公告)号：US09793378B2

公开(公告)日：2017-10-17

申请号：US13906677

申请日：2013-05-31

Applicant: STMicroelectronics, Inc. ,  International Business Machines Corporation

Inventor： Nicolas Loubet ,  Shom Ponoth ,  Prasanna Khare ,  Qing Liu ,  Balasubramanian Pranatharthiharan

IPC: H01L29/66 ,  H01L21/8234 ,  H01L27/088 ,  H01L29/78

CPC classification number: H01L29/66795 ,  H01L21/823412 ,  H01L21/823418 ,  H01L21/823431 ,  H01L27/0886 ,  H01L29/7848 ,  H01L29/785

Abstract: Improved fin field effect transistor (FinFET) devices and methods for fabrication thereof. In one aspect, a method for fabricating a FinFET device comprises: a silicon substrate on which a silicon epitaxial layer is grown is provided. Sacrificial structures on the substrate are formed from the epitaxial layer. A blanket silicon layer is formed over the sacrificial structures and exposed substrate portions, the blanket silicon layer having upper and lower portions of uniform thickness and intermediate portions interposed between the upper and lower portions of non-uniform thickness and having an angle of formation. An array of semiconducting fins is formed from the blanket silicon layer and a non-conformal layer formed over the blanket layer. The sacrificial structures are removed and the resulting void filled with isolation structures under the channel regions. Source and drain are formed in the source/drain regions during a fin merge of the FinFET.