公开(公告)号：US20200006157A1

公开(公告)日：2020-01-02

申请号：US16569820

申请日：2019-09-13

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Kun-Yu Lee ,  Huicheng Chang ,  Che-Hao Chang ,  Ching-Hwanq Su ,  Weng Chang ,  Xiong-Fei Yu

IPC: H01L21/8238 ,  H01L27/092

Abstract: Embodiments described herein relate to a method for patterning a doping layer, such as a lanthanum containing layer, used to dope a high-k dielectric layer in a gate stack of a FinFET device for threshold voltage tuning. A blocking layer may be formed between the doping layer and a hard mask layer used to pattern the doping layer. In an embodiment, the blocking layer may include or be aluminum oxide (AlOx). The blocking layer can prevent elements from the hard mask layer from diffusing into the doping layer, and thus, can improve reliability of the devices formed. The blocking layer can also improve a patterning process by reducing patterning induced defects.

公开(公告)号：US10510621B2

公开(公告)日：2019-12-17

申请号：US15952534

申请日：2018-04-13

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Zoe Chen ,  Ching-Hwanq Su ,  Cheng-Lung Hung ,  Cheng-Yen Tsai ,  Da-Yuan Lee ,  Hsin-Yi Lee ,  Weng Chang ,  Wei-Chin Lee

IPC: H01L21/8238 ,  H01L27/092 ,  H01L29/10

Abstract: Generally, the present disclosure provides example embodiments relating to tuning threshold voltages in transistor devices and the transistor devices formed thereby. Various examples implementing various mechanisms for tuning threshold voltages are described. In an example method, a gate dielectric layer is deposited over an active area in a device region of a substrate. A dipole layer is deposited over the gate dielectric layer in the device region. A dipole dopant species is diffused from the dipole layer into the gate dielectric layer in the device region.

公开(公告)号：US20190371674A1

公开(公告)日：2019-12-05

申请号：US15993210

申请日：2018-05-30

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Chung-Chiang Wu ,  Wei-Chin Lee ,  Shih-Hang Chiu ,  Chia-Ching Lee ,  Hsueh Wen Tsau ,  Cheng-Yen Tsai ,  Cheng-Lung Hung ,  Da-Yuan Lee ,  Ching-Hwanq Su

IPC: H01L21/8234 ,  H01L27/088

Abstract: Semiconductor device structures having gate structures with tunable threshold voltages are provided. Various geometries of device structure can be varied to tune the threshold voltages. In some examples, distances from tops of fins to tops of gate structures can be varied to tune threshold voltages. In some examples, distances from outermost sidewalls of gate structures to respective nearest sidewalls of nearest fins to the respective outermost sidewalls (which respective gate structure overlies the nearest fin) can be varied to tune threshold voltages.

公开(公告)号：US20190318967A1

公开(公告)日：2019-10-17

申请号：US15952534

申请日：2018-04-13

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Zoe Chen ,  Ching-Hwanq Su ,  Cheng-Lung Hung ,  Cheng-Yen Tsai ,  Da-Yuan Lee ,  Hsin-Yi Lee ,  Weng Chang ,  Wei-Chin Lee

IPC: H01L21/8238 ,  H01L27/092 ,  H01L29/10

Abstract: Generally, the present disclosure provides example embodiments relating to tuning threshold voltages in transistor devices and the transistor devices formed thereby. Various examples implementing various mechanisms for tuning threshold voltages are described. In an example method, a gate dielectric layer is deposited over an active area in a device region of a substrate. A dipole layer is deposited over the gate dielectric layer in the device region. A dipole dopant species is diffused from the dipole layer into the gate dielectric layer in the device region.