公开(公告)号：US20220359734A1

公开(公告)日：2022-11-10

申请号：US17814185

申请日：2022-07-21

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Ssu-Yu Liao ,  Tsu-Hui Su ,  Chun-Hsiang Fan ,  Yu-Wen Wang ,  Ming-Hsi Yeh ,  Kuo-Bin Huang

IPC: H01L29/66 ,  H01L21/02 ,  H01L21/8238 ,  H01L27/092 ,  H01L29/06 ,  H01L29/08 ,  H01L29/10 ,  H01L29/161 ,  H01L29/423 ,  H01L29/78 ,  H01L29/786

Abstract: Methods for improving profiles of channel regions in semiconductor devices and semiconductor devices formed by the same are disclosed. In an embodiment, a method includes forming a semiconductor fin over a semiconductor substrate, the semiconductor fin including germanium, a germanium concentration of a first portion of the semiconductor fin being greater than a germanium concentration of a second portion of the semiconductor fin, a first distance between the first portion and a major surface of the semiconductor substrate being less than a second distance between the second portion and the major surface of the semiconductor substrate; and trimming the semiconductor fin, the first portion of the semiconductor fin being trimmed at a greater rate than the second portion of the semiconductor fin.

公开(公告)号：US10777649B2

公开(公告)日：2020-09-15

申请号：US15463692

申请日：2017-03-20

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Tsu-Hui Su ,  Chih-Ming Chen ,  Chia-Shiung Tsai ,  Chung-Yi Yu ,  Szu-Yu Wang

IPC: H01L29/423 ,  H01L21/28 ,  H01L29/792 ,  H01L29/66 ,  H01L29/788 ,  H01L21/3205 ,  H01L21/321 ,  H01L29/49

Abstract: A quantum nano-tip (QNT) thin film, such as a silicon nano-tip (SiNT) thin film, for flash memory cells is provided to increase erase speed. The QNT thin film includes a first dielectric layer and a second dielectric layer arranged over the first dielectric layer. Further, the QNT thin film includes QNTs arranged over the first dielectric layer and extending into the second dielectric layer. A ratio of height to width of the QNTs is greater than 50 percent. A QNT based flash memory cell and a method for manufacture a SiNT based flash memory cell are also provided.

公开(公告)号：US09929007B2

公开(公告)日：2018-03-27

申请号：US14583291

申请日：2014-12-26

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Chih-Ming Chen ,  Tsu-Hui Su ,  Szu-Yu Wang ,  Chung-Yi Yu ,  Chia-Shiung Tsai

IPC: H01L29/792 ,  H01L21/02 ,  H01L29/66 ,  H01L29/423 ,  H01L21/28

CPC classification number: H01L21/02247 ,  H01L21/02164 ,  H01L21/0217 ,  H01L21/02252 ,  H01L21/02255 ,  H01L21/28273 ,  H01L21/28282 ,  H01L29/42344 ,  H01L29/42348 ,  H01L29/66833 ,  H01L29/7923

Abstract: The present disclosure relates to a structure and method for reducing dangling bonds around quantum dots in a memory cell. In some embodiments, the structure has a semiconductor substrate having a tunnel dielectric layer disposed over it and a plurality of quantum dots disposed over the tunnel dielectric layer. A passivation layer is formed conformally over outer surfaces of the quantum dots and a top dielectric layer is disposed conformally around the passivation layer. The passivation layer can be formed prior to forming the top dielectric layer over the quantum dots or after forming the top dielectric layer. The passivation layer reduces the dangling bonds at an interface between the quantum dots and the top dielectric layer, thereby preventing trap sites that may hinder operations of the memory cell.

公开(公告)号：US20170194445A1

公开(公告)日：2017-07-06

申请号：US15463692

申请日：2017-03-20

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Tsu-Hui Su ,  Chih-Ming Chen ,  Chia-Shiung Tsai ,  Chung-Yi Yu ,  Szu-Yu Wang

IPC: H01L29/423 ,  H01L29/49 ,  H01L21/3205 ,  H01L21/321 ,  H01L21/28 ,  H01L29/66

Abstract: A quantum nano-tip (QNT) thin film, such as a silicon nano-tip (SiNT) thin film, for flash memory cells is provided to increase erase speed. The QNT thin film includes a first dielectric layer and a second dielectric layer arranged over the first dielectric layer. Further, the QNT thin film includes QNTs arranged over the first dielectric layer and extending into the second dielectric layer. A ratio of height to width of the QNTs is greater than 50 percent. A QNT based flash memory cell and a method for manufacture a SiNT based flash memory cell are also provided.

公开(公告)号：US12176422B2

公开(公告)日：2024-12-24

申请号：US18361540

申请日：2023-07-28

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Tsu-Hui Su ,  Chun-Hsiang Fan ,  Yu-Wen Wang ,  Ming-Hsi Yeh ,  Kuo-Bin Huang

IPC: H01L29/66 ,  H01L21/306 ,  H01L21/66 ,  H01L21/762 ,  H01L21/8238

Abstract: A method includes forming isolation regions extending into a semiconductor substrate. A semiconductor strip is between the isolation regions. The method further includes recessing the isolation regions so that a top portion of the semiconductor strip protrudes higher than top surfaces of the isolation regions to form a semiconductor fin, measuring a fin width of the semiconductor fin, generating an etch recipe based on the fin width, and performing a thinning process on the semiconductor fin using the etching recipe.

公开(公告)号：US20240387709A1

公开(公告)日：2024-11-21

申请号：US18787192

申请日：2024-07-29

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Ssu-Yu Liao ,  Tsu-Hui Su ,  Chun-Hsiang Fan ,  Yu-Wen Wang ,  Ming-Hsi Yeh ,  Kuo-Bin Huang

IPC: H01L29/66 ,  H01L21/02 ,  H01L21/8238 ,  H01L27/092 ,  H01L29/06 ,  H01L29/08 ,  H01L29/10 ,  H01L29/161 ,  H01L29/423 ,  H01L29/78 ,  H01L29/786

Abstract: Methods for improving profiles of channel regions in semiconductor devices and semiconductor devices formed by the same are disclosed. In an embodiment, a method includes forming a semiconductor fin over a semiconductor substrate, the semiconductor fin including germanium, a germanium concentration of a first portion of the semiconductor fin being greater than a germanium concentration of a second portion of the semiconductor fin, a first distance between the first portion and a major surface of the semiconductor substrate being less than a second distance between the second portion and the major surface of the semiconductor substrate; and trimming the semiconductor fin, the first portion of the semiconductor fin being trimmed at a greater rate than the second portion of the semiconductor fin.

公开(公告)号：US20230147848A1

公开(公告)日：2023-05-11

申请号：US18151089

申请日：2023-01-06

Applicant: Taiwan Semiconductor Manufacturing Co, Ltd.

Inventor： Tsu-Hui Su ,  Ssu-Yu Liao ,  Chun-Hsiang Fan ,  Kuo-Bin Huang

IPC: H01L29/66 ,  H01L21/306 ,  H01L21/8238 ,  H01L21/762 ,  H01L21/66

CPC classification number: H01L29/66795 ,  H01L29/66545 ,  H01L21/30604 ,  H01L21/823878 ,  H01L21/76224 ,  H01L21/823821 ,  H01L22/12

Abstract: A method includes depositing a silicon layer over a semiconductor region, forming dielectric isolation regions extending into the silicon layer and the semiconductor region, and recessing the dielectric isolation regions. A first portion of the silicon layer and a second portion of the semiconductor region are between the dielectric isolation regions, and protrude higher than top surfaces of the dielectric isolation regions to form a semiconductor fin. The semiconductor fin is thinned, and after the first semiconductor fin is thinned, the first portion of the silicon layer remains. A gate stack is formed on the semiconductor fin.

公开(公告)号：US20210391449A1

公开(公告)日：2021-12-16

申请号：US16899119

申请日：2020-06-11

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Ssu-Yu Liao ,  Tsu-Hui Su ,  Chun-Hsiang Fan ,  Yu-Wen Wang ,  Ming-Hsi Yeh ,  Kuo-Bin Huang

IPC: H01L29/66 ,  H01L27/092 ,  H01L29/06 ,  H01L29/423 ,  H01L29/786 ,  H01L29/08 ,  H01L29/161 ,  H01L29/10 ,  H01L29/78 ,  H01L21/02 ,  H01L21/8238

Abstract: Methods for improving profiles of channel regions in semiconductor devices and semiconductor devices formed by the same are disclosed. In an embodiment, a method includes forming a semiconductor fin over a semiconductor substrate, the semiconductor fin including germanium, a germanium concentration of a first portion of the semiconductor fin being greater than a germanium concentration of a second portion of the semiconductor fin, a first distance between the first portion and a major surface of the semiconductor substrate being less than a second distance between the second portion and the major surface of the semiconductor substrate; and trimming the semiconductor fin, the first portion of the semiconductor fin being trimmed at a greater rate than the second portion of the semiconductor fin.

公开(公告)号：US09577077B2

公开(公告)日：2017-02-21

申请号：US14308808

申请日：2014-06-19

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Tsu-Hui Su ,  Chih-Ming Chen ,  Szu-Yu Wang ,  Chung-Yi Yu ,  Chia-Shiung Tsai

IPC: H01L27/115 ,  H01L29/66 ,  H01L29/792 ,  H01L21/28 ,  H01L29/423 ,  H01L29/788

CPC classification number: H01L29/66833 ,  H01L21/28273 ,  H01L21/28282 ,  H01L29/42324 ,  H01L29/4234 ,  H01L29/66825 ,  H01L29/7881 ,  H01L29/792

Abstract: Some embodiments of the present disclosure relate to a method for forming flash memory. In this method, a first tunnel oxide is formed over a semiconductor substrate. A self-assembled monolayer (SAM) is then formed on the first tunnel oxide. The SAM includes spherical or spherical-like crystalline silicon dots having respective diameters which are less than approximately 30 nm. A second tunnel oxide is then formed over the SAM.

Abstract translation: 本公开的一些实施例涉及用于形成快闪存储器的方法。 在该方法中，在半导体衬底上形成第一隧道氧化物。 然后在第一隧道氧化物上形成自组装单层（SAM）。 SAM包括具有小于约30nm的相应直径的球形或球形晶体硅点。 然后在SAM上形成第二隧道氧化物。

公开(公告)号：US09401434B2

公开(公告)日：2016-07-26

申请号：US14489902

申请日：2014-09-18

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Chih-Ming Chen ,  Tsu-Hui Su ,  Szu-Yu Wang ,  Chung-Yi Yu

IPC: H01L29/788 ,  H01L29/792 ,  H01L29/423 ,  H01L29/66 ,  H01L29/40

CPC classification number: H01L29/7883 ,  G11C16/0483 ,  G11C16/14 ,  H01L21/28273 ,  H01L21/28282 ,  H01L29/0665 ,  H01L29/401 ,  H01L29/42328 ,  H01L29/42332 ,  H01L29/42344 ,  H01L29/66825 ,  H01L29/66833 ,  H01L29/792

Abstract: The present disclosure relates to a structure and method for forming a flash memory cell with an improved erase speed and erase current. Si dots are used for charge trapping and an ONO sandwich structure is formed over the Si dots. Erase operation includes direct tunneling as well as FN tunneling which helps increase erase speed without compensating data retention.

Abstract translation: 本发明涉及用于形成具有改进的擦除速度和擦除电流的闪存单元的结构和方法。 Si点用于电荷俘获，并且在Si点上形成ONO夹层结构。 擦除操作包括直接隧道和FN隧道，这有助于提高擦除速度，而不会补偿数据保留。