- 专利标题: Partial Directional Etch Method and Resulting Structures
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申请号: US17809055申请日: 2022-06-27
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公开(公告)号: US20220328656A1公开(公告)日: 2022-10-13
- 发明人: Shiang-Bau Wang
- 申请人: Taiwan Semiconductor Manufacturing Co., Ltd.
- 申请人地址: TW Hsinchu
- 专利权人: Taiwan Semiconductor Manufacturing Co., Ltd.
- 当前专利权人: Taiwan Semiconductor Manufacturing Co., Ltd.
- 当前专利权人地址: TW Hsinchu
- 主分类号: H01L29/66
- IPC分类号: H01L29/66 ; H01L29/78 ; H01L27/088
摘要:
In a gate replacement process, a dummy gate and adjacent structure, such as a source/drain region, are formed. The dummy gate is removed, at least in part, using a directional etch to remove some but not all of the dummy gate to form a trench. A portion of the dummy gate remains and protects the adjacent structure. A gate electrode can then be formed in the trench. A two step process can be employed, using an initial isotropic etch followed by the directional etch.
公开/授权文献
- US11728407B2 Partial directional etch method and resulting structures 公开/授权日:2023-08-15
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