Invention Grant
- Patent Title: Metal gate structure and methods thereof
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Application No.: US16404101Application Date: 2019-05-06
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Publication No.: US10748898B2Publication Date: 2020-08-18
- 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
- Main IPC: H01L27/088
- IPC: H01L27/088 ; H01L21/8234 ; H01L21/3213 ; H01L21/311 ; H01L29/66 ; H01L29/49 ; H01L29/51 ; H01L29/06 ; H01L29/423 ; H01L21/8238 ; H01L27/092

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
- US20190326282A1 METAL GATE STRUCTURE AND METHODS THEREOF Public/Granted day:2019-10-24
Information query
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