公开(公告)号：US11915972B2

公开(公告)日：2024-02-27

申请号：US17812902

申请日：2022-07-15

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

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

IPC: H01L21/768 ,  H01L21/02 ,  H01L23/528 ,  H01L23/532 ,  H01L29/06 ,  H01L29/417 ,  H01L29/423 ,  H01L29/66 ,  H01L29/78 ,  H01L29/786

CPC classification number: H01L21/7682 ,  H01L21/02603 ,  H01L21/76805 ,  H01L21/76895 ,  H01L23/5286 ,  H01L23/5329 ,  H01L29/0673 ,  H01L29/41733 ,  H01L29/42392 ,  H01L29/66545 ,  H01L29/66553 ,  H01L29/66636 ,  H01L29/66742 ,  H01L29/7848 ,  H01L29/78618 ,  H01L29/78696

Abstract: Semiconductor devices including air spacers formed in a backside interconnect structure and methods of forming the same are disclosed. In an embodiment, a device includes a first transistor structure; a front-side interconnect structure on a front-side of the first transistor structure; and a backside interconnect structure on a backside of the first transistor structure, the backside interconnect structure including a first dielectric layer on the backside of the first transistor structure; a first via extending through the first dielectric layer, the first via being electrically coupled to a first source/drain region of the first transistor structure; a first conductive line electrically coupled to the first via; and an air spacer adjacent the first conductive line, the first conductive line defining a first side boundary of the air spacer.

公开(公告)号：US11901423B2

公开(公告)日：2024-02-13

申请号：US17814098

申请日：2022-07-21

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

CPC classification number: H01L29/41791 ,  H01L29/0653 ,  H01L29/401 ,  H01L29/66795 ,  H01L29/7853

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：US20240021726A1

公开(公告)日：2024-01-18

申请号：US18359323

申请日：2023-07-26

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Chia-Hao Chang ,  Lin-Yu Huang ,  Han-Jong Chia ,  Bo-Feng Young ,  Yu-Ming Lin

IPC: H01L29/78 ,  H01L21/28 ,  H01L29/51

CPC classification number: H01L29/78391 ,  H01L29/40111 ,  H01L29/516

Abstract: A device includes a substrate, gate stacks, source/drain (S/D) features over the substrate, S/D contacts over the S/D features, and one or more dielectric layers over the gate stacks and the S/D contacts. A via structure penetrates the one or more dielectric layers and electrically contacts one of the gate stacks and the S/D contacts. And a ferroelectric (FE) stack is over the via structure and directly contacting the via structure, wherein the FE stack includes an FE feature and a top electrode over the FE feature.

公开(公告)号：US20230386971A1

公开(公告)日：2023-11-30

申请号：US18149899

申请日：2023-01-04

Applicant: Taiwan Semiconductor Manufacturing Co, Ltd.

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

IPC: H01L23/48 ,  H01L21/768 ,  H01L21/762 ,  H01L27/088

CPC classification number: H01L23/481 ,  H01L21/76898 ,  H01L21/76224 ,  H01L27/088

Abstract: Methods of forming through vias for providing connections between a front-side of a substrate and a backside of the substrate and semiconductor devices including the same are disclosed. In an embodiment, a semiconductor device includes a gate structure on a substrate; a first isolation feature extending partially through the gate structure; a first conductive feature extending through the first isolation feature; and a second conductive feature extending partially through the gate structure, the second conductive feature being electrically coupled to the first conductive feature.

公开(公告)号：US11830769B2

公开(公告)日：2023-11-28

申请号：US17869337

申请日：2022-07-20

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

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

IPC: H01L21/768 ,  H01L21/76 ,  H01L23/528 ,  H01L23/532 ,  H01L29/40 ,  H01L29/417 ,  H01L29/423 ,  H01L29/786 ,  H01L21/02 ,  H01L29/06

CPC classification number: H01L21/7682 ,  H01L21/76 ,  H01L21/76834 ,  H01L23/5286 ,  H01L23/53295 ,  H01L29/401 ,  H01L29/41791 ,  H01L29/42392 ,  H01L29/78696 ,  H01L21/02172 ,  H01L21/02274 ,  H01L29/0673

Abstract: A semiconductor structure includes first and second source/drain (S/D) features, one or more semiconductor channel layers connecting the first and second S/D features, a gate structure engaging the one or more semiconductor channel layers, a metal wiring layer at a backside of the semiconductor structure, an S/D contact electrically connecting the first S/D feature to the metal wiring layer, and a seal layer between the metal wiring layer and the gate structure. The seal layer is spaced away from the gate structure by an air gap therebetween.

公开(公告)号：US11588050B2

公开(公告)日：2023-02-21

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: H01L29/76 ,  H01L29/78 ,  H01L29/66 ,  H01L29/08 ,  H01L21/02

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：US20220367379A1

公开(公告)日：2022-11-17

申请号：US17871272

申请日：2022-07-22

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Lin-Yu Huang ,  Sheng-Tsung Wang ,  Jia-Chuan You ,  Chia-Hao Chang ,  Tien-Lu Lin ,  Yu-Ming Lin ,  Chih-Hao Wang

IPC: H01L23/532 ,  H01L29/78 ,  H01L29/40 ,  H01L23/522 ,  H01L21/768 ,  H01L29/417

Abstract: Semiconductor device and the manufacturing method thereof are disclosed herein. An exemplary semiconductor device comprises a fin disposed over a substrate, a gate structure disposed over a channel region of the fin, such that the gate structure traverses source/drain regions of the fin, a device-level interlayer dielectric (ILD) layer of a multi-layer interconnect structure disposed over the substrate, wherein the device-level ILD layer includes a first dielectric layer, a second dielectric layer disposed over the first dielectric layer, and a third dielectric layer disposed over the second dielectric layer, wherein a material of the third dielectric layer is different than a material of the second dielectric layer and a material of the first dielectric layer. The semiconductor device further comprises a gate contact to the gate structure disposed in the device-level ILD layer and a source/drain contact to the source/drain regions disposed in the device-level ILD layer.

公开(公告)号：US11482594B2

公开(公告)日：2022-10-25

申请号：US17159309

申请日：2021-01-27

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

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

IPC: H01L29/06 ,  H01L29/08 ,  H01L29/66 ,  H01L29/78 ,  H01L29/423 ,  H01L29/45 ,  H01L27/088 ,  H01L21/8234 ,  H01L21/8238 ,  H01L27/092 ,  H01L23/528

Abstract: A semiconductor structure includes one or more channel layers; a gate structure engaging the one or more channel layers; a first source/drain feature connected to a first side of the one or more channel layers and adjacent to the gate structure; a first dielectric cap disposed over the first source/drain feature, wherein a bottom surface of the first dielectric cap is below a top surface of the gate structure; a via disposed under and electrically connected to the first source/drain feature; and a power rail disposed under and electrically connected to the via.

公开(公告)号：US20220293521A1

公开(公告)日：2022-09-15

申请号：US17682884

申请日：2022-02-28

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: H01L23/528 ,  H01L21/768 ,  H01L23/522 ,  H01L21/3213

Abstract: Semiconductor devices and methods of forming the same are provided. In one embodiment, a semiconductor device includes an active region including a channel region and a source/drain region and extending along a first direction, and a source/drain contact structure over the source/drain region. The source/drain contact structure includes a base portion extending lengthwise along a second direction perpendicular to the first direction, and a via portion over the base portion. The via portion tapers away from the base portion.

公开(公告)号：US11361986B2

公开(公告)日：2022-06-14

申请号：US16808902

申请日：2020-03-04

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

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

IPC: H01L21/768 ,  H01L23/522 ,  H01L29/66 ,  H01L29/417

Abstract: In some embodiments, the present disclosure relates to an integrated chip that includes a substrate, a first contact layer, and a gate electrode. The first contact layer overlies the substrate and the gate electrode overlies the substrate and is laterally spaced from the first contact layer. A first spacer structure surrounds outermost sidewalls of the first contact layer and separates the gate electrode from the first contact layer. A first hard mask structure is arranged over the first contact layer and is between portions of the first spacer structure. A first contact via extends through the first hard mask structure and contacts the first contact layer. A first liner layer is arranged directly between the first hard mask structure and the first spacer structure.