Invention Grant
- Patent Title: Metal gate structure and methods thereof
-
Application No.: US17446900Application Date: 2021-09-03
-
Publication No.: US11682669B2Publication Date: 2023-06-20
- Inventor: Ming-Chi Huang , Ying-Liang Chuang , Ming-Hsi Yeh , Kuo-Bin Huang
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Haynes and Boone, LLP
- The original application number of the division: US16947758 2020.08.14
- Main IPC: H01L27/088
- IPC: H01L27/088 ; H01L21/311 ; H01L21/3213 ; H01L21/8234 ; H01L21/8238 ; H01L27/092 ; H01L29/06 ; H01L29/423 ; H01L29/49 ; H01L29/51 ; H01L29/66

Abstract:
Provided is a metal gate structure and related methods that include performing a metal gate cut process. The metal gate cut process includes a plurality of etching steps. For example, a first anisotropic dry etch is performed, a second isotropic dry etch is performed, and a third wet etch is performed. In some embodiments, the second isotropic etch removes a residual portion of a metal gate layer including a metal containing layer. In some embodiments, the third etch removes a residual portion of a dielectric layer.
Public/Granted literature
- US20210398975A1 METAL GATE STRUCTURE AND METHODS THEREOF Public/Granted day:2021-12-23
Information query
IPC分类: