Invention Grant
- Patent Title: Different via configurations for different via interface requirements
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Application No.: US16984884Application Date: 2020-08-04
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Publication No.: US11532561B2Publication Date: 2022-12-20
- Inventor: Shih-Che Lin , Po-Yu Huang , Chao-Hsun Wang , Kuo-Yi Chao , Mei-Yun Wang , Feng-Yu Chang , Rueijer Lin , Wei-Jung Lin , Chen-Yuan Kao
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Haynes and Boone, LLP
- Main IPC: H01L23/535
- IPC: H01L23/535 ; H01L29/45 ; H01L21/311 ; H01L21/3213 ; H01L21/768 ; H01L21/285 ; H01L23/48

Abstract:
Vias, along with methods for fabricating vias, are disclosed that exhibit reduced capacitance and resistance. An exemplary interconnect structure includes a first source/drain contact and a second source/drain contact disposed in a dielectric layer. The first source/drain contact physically contacts a first source/drain feature and the second source/drain contact physically contacts a second source/drain feature. A first via having a first via layer configuration, a second via having a second via layer configuration, and a third via having a third via layer configuration are disposed in the dielectric layer. The first via and the second via extend into and physically contact the first source/drain contact and the second source/drain contact, respectively. A first thickness of the first via and a second thickness of the second via are the same. The third via physically contacts a gate structure, which is disposed between the first source/drain contact and the second source/drain contact.
Public/Granted literature
- US20210098376A1 Different Via Configurations for Different Via Interface Requirements Public/Granted day:2021-04-01
Information query
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