公开(公告)号：US20220173223A1

公开(公告)日：2022-06-02

申请号：US17676699

申请日：2022-02-21

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Li-Zhen Yu ,  Lin-Yu Huang ,  Chia-Hao Chang ,  Cheng-Chi Chuang ,  Yu-Ming Lin ,  Chih-Hao Wang

IPC: H01L29/66 ,  H01L21/768

Abstract: Semiconductor devices and methods of forming the same are provided. In one embodiment, a semiconductor device includes a gate structure sandwiched between and in contact with a first spacer feature and a second spacer feature, a top surface of the first spacer feature and a top surface of the second spacer feature extending above a top surface of the gate structure, a gate self-aligned contact (SAC) dielectric feature over the first spacer feature and the second spacer feature, a contact etch stop layer (CESL) over the gate SAC dielectric feature, a dielectric layer over the CESL, a gate contact feature extending through the dielectric layer, the CESL, the gate SAC dielectric feature, and between the first spacer feature and the second spacer feature to be in contact with the gate structure, and a liner disposed between the first spacer feature and the gate contact feature.

公开(公告)号：US20220165659A1

公开(公告)日：2022-05-26

申请号：US17104760

申请日：2020-11-25

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Lin-Yu Huang ,  Li-Zhen Yu ,  Chia-Hao Chang ,  Cheng-Chi Chuang ,  Kuan-Lun Cheng ,  Chih-Hao Wang

IPC: H01L23/522 ,  H01L29/417 ,  H01L21/768 ,  H01L29/40 ,  H01L23/528 ,  H01L23/532

Abstract: A semiconductor structure and the manufacturing method thereof are disclosed. An exemplary semiconductor structure includes a source/drain (S/D) feature formed in an interlayer dielectric layer (ILD), a S/D contact via electrically connected to the S/D feature, a metal feature formed over the S/D contact via, and a metal line formed over the metal feature and electrically connected to the S/D contact via. The metal line is formed of a material different from that of the S/D contact via, and the S/D contact via is spaced apart from the metal line. By providing the metal feature, electromigration between the metal line and the contact via may be advantageously reduced or substantially eliminated.

公开(公告)号：US20220115510A1

公开(公告)日：2022-04-14

申请号：US17069344

申请日：2020-10-13

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Li-Zhen YU ,  Cheng-Chi Chuang ,  Chih-Hao Wang ,  Huan-Chieh Su ,  Lin-Yu Huang

IPC: H01L29/417 ,  H01L29/66 ,  H01L29/40 ,  H01L29/06 ,  H01L29/78

Abstract: The present disclosure describes a method to form a backside power rail (BPR) semiconductor device with an air gap. The method includes forming a fin structure on a first side of a substrate, forming a source/drain (S/D) region adjacent to the fin structure, forming a first S/D contact structure on the first side of the substrate and in contact with the S/D region, and forming a capping structure on the first S/D contact structure. The method further includes removing a portion of the first S/D contact structure through the capping structure to form an air gap and forming a second S/D contact structure on a second side of the substrate and in contact with the S/D region. The second side is opposite to the first side.

公开(公告)号：US11302798B2

公开(公告)日：2022-04-12

申请号：US16888138

申请日：2020-05-29

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Cheng-Chi Chuang ,  Lin-Yu Huang ,  Chia-Hao Chang ,  Yu-Ming Lin ,  Ting-Ya Lo ,  Chi-Lin Teng ,  Hsin-Yen Huang ,  Hai-Ching Chen

IPC: H01L29/66 ,  H01L29/49 ,  H01L29/78 ,  H01L21/8234

Abstract: A method includes providing a structure having a gate stack; first gate spacers; a second gate spacer over one of the first gate spacers and having an upper portion over a lower portion; a dummy spacer; an etch stop layer; and a dummy cap. The method further includes removing the dummy cap, resulting in a first void above the gate stack and between the first gate spacers; removing the dummy spacer, resulting in a second void above the lower portion and between the etch stop layer and the upper portion; depositing a layer of a decomposable material into the first and the second voids; depositing a seal layer over the etch stop layer, the first and the second gate spacers, and the layer of the decomposable material; and removing the layer of the decomposable material, thereby reclaiming at least portions of the first and the second voids.

公开(公告)号：US20220069117A1

公开(公告)日：2022-03-03

申请号：US17112293

申请日：2020-12-04

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Li-Zhen Yu ,  Huan-Chieh Su ,  Lin-Yu Huang ,  Kuan-Lun Cheng ,  Chih-Hao Wang

IPC: H01L29/78 ,  H01L29/66 ,  H01L21/02 ,  H01L29/08

Abstract: A semiconductor structure and a method of forming the same are provided. In an embodiment, a semiconductor structure includes an epitaxial source feature and an epitaxial drain feature, a vertical stack of channel members disposed over a backside dielectric layer, the vertical stack of channel members extending between the epitaxial source feature and the epitaxial drain feature along a direction, a gate structure wrapping around each of the vertical stack of channel members, and a backside source contact disposed in the backside dielectric layer. The backside source contact includes a top portion adjacent the epitaxial source feature and a bottom portion away from the epitaxial source feature. The top portion and the bottom portion includes a step width change along the direction.

公开(公告)号：US20220028999A1

公开(公告)日：2022-01-27

申请号：US16935061

申请日：2020-07-21

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Chia-Hao Chang ,  Lin-Yu Huang ,  Sheng-Tsung Wang ,  Cheng-Chi Chuang ,  Yu-Ming Lin ,  Chih-Hao Wang

IPC: H01L29/66 ,  H01L21/768 ,  H01L29/417 ,  H01L29/78

Abstract: Semiconductor devices and methods of forming the same are provided. A semiconductor device according to one embodiment includes an active region including a channel region and a source/drain region adjacent the channel region, a gate structure over the channel region of the active region, a source/drain contact over the source/drain region, a dielectric feature over the gate structure and including a lower portion adjacent the gate structure and an upper portion away from the gate structure, and an air gap disposed between the gate structure and the source/drain contact. A first width of the upper portion of the dielectric feature along a first direction is greater than a second width of the lower portion of the dielectric feature along the first direction. The air gap is disposed below the upper portion of the dielectric feature.

公开(公告)号：US20210408247A1

公开(公告)日：2021-12-30

申请号：US17091159

申请日：2020-11-06

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Li-Zhen Yu ,  Huan-Chieh Su ,  Lin-Yu Huang ,  Cheng-Chi Chuang ,  Chih-Hao Wang

IPC: H01L29/417 ,  H01L23/528 ,  H01L29/06 ,  H01L29/423 ,  H01L29/78 ,  H01L29/786 ,  H01L21/02 ,  H01L29/66

Abstract: A device includes a device layer comprising a first transistor and a second transistor; a first interconnect structure on a front-side of the device layer; and a second interconnect structure on a backside of the device layer. The second interconnect structure comprising a first dielectric layer on the backside of the device layer, wherein a semiconductor material is disposed between the first dielectric layer and a first source/drain region of the first transistor; a contact extending through the first dielectric layer to a second source/drain region of the second transistor; and a first conductive line electrically connected to the second source/drain region of the second transistor through the contact.

公开(公告)号：US20210328032A1

公开(公告)日：2021-10-21

申请号：US16850267

申请日：2020-04-16

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Li-Zhen Yu ,  Lin-Yu Huang ,  Cheng-Chi Chuang ,  Yu-Ming Lin ,  Chih-Hao Wang

IPC: H01L29/417 ,  H01L29/49 ,  H01L29/78 ,  H01L21/321 ,  H01L21/285 ,  H01L29/66

Abstract: A semiconductor structure includes a metal gate structure (MG) formed over a substrate, a first gate spacer formed on a first sidewall of the MG, a second gate spacer formed on a second sidewall of the MG opposite to the first sidewall, where the second gate spacer is shorter than the first gate spacer, a source/drain (S/D) contact (MD) adjacent to the MG, where a sidewall of the MD is defined by the second gate spacer, and a contact feature configured to electrically connect the MG to the MD.

公开(公告)号：US11152475B2

公开(公告)日：2021-10-19

申请号：US16881481

申请日：2020-05-22

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Lin-Yu Huang ,  Li-Zhen Yu ,  Chia-Hao Chang ,  Cheng-Chi Chuang ,  Yu-Ming Lin ,  Chih-Hao Wang

IPC: H01L21/28 ,  H01L29/417 ,  H01L21/8234

Abstract: A method includes providing a structure having a substrate, a gate, a gate spacer, a dielectric gate cap, a source/drain (S/D) feature, a contact etch stop layer (CESL) covering a sidewall of the gate spacer and a top surface of the S/D feature, and an inter-level dielectric (ILD) layer. The method includes etching a contact hole through the ILD layer and through a portion of the CESL, the contact hole exposing the CESL covering the sidewalls of the gate spacer and exposing a top portion of the S/D feature. The method includes forming a silicide feature on the S/D feature and selectively depositing an inhibitor on the silicide feature. The inhibitor is not deposited on surfaces of the CESL other than at a corner area where the CESL and the silicide feature meet.

公开(公告)号：US20210083067A1

公开(公告)日：2021-03-18

申请号：US16571715

申请日：2019-09-16

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Sheng-Tsung Wang ,  Lin-Yu Huang ,  Chia-Lin Chuang ,  Chia-Hao Chang ,  Cheng-Chi Chuang ,  Yu-Ming Lin ,  Chih-Hao Wang

IPC: H01L29/49 ,  H01L29/45 ,  H01L29/78 ,  H01L21/28 ,  H01L21/764 ,  H01L29/66

Abstract: A semiconductor device structure includes a gate stack and an adjacent source/drain contact structure formed over a semiconductor substrate. The semiconductor device structure includes a first gate spacer structure extending from a sidewall of the gate stack to a sidewall of the source/drain contact structure, and a second gate spacer structure formed over the first gate spacer structure and between the gate stack and the source/drain contact structure. The second gate spacer structure includes first and second gate spacer layers adjacent to the sidewall of the gate stack and the sidewall of the source/drain contact structure, respectively, and a third gate spacer layer separating the first gate spacer layer from the second gate spacer layer, so that an air gap is sealed by the first, second, and the third gate spacer layers and the first gate spacer structure.