Invention Grant
- Patent Title: Contact formation method and related structure
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Application No.: US16751136Application Date: 2020-01-23
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Publication No.: US11322394B2Publication Date: 2022-05-03
- Inventor: Chao-Hsun Wang , Wang-Jung Hsueh , Kuo-Yi Chao , Mei-Yun Wang
- 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: H01L21/768
- IPC: H01L21/768 ; H01L29/423 ; H01L21/321 ; H01L21/8234 ; H01L21/3105 ; H01L29/417 ; H01L29/08 ; H01L29/49

Abstract:
A method and structure for forming a via-first metal gate contact includes depositing a first dielectric layer over a substrate having a gate structure with a metal gate layer. An opening is formed within the first dielectric layer to expose a portion of the substrate, and a first metal layer is deposited within the opening. A second dielectric layer is deposited over the first dielectric layer and over the first metal layer. The first and second dielectric layers are etched to form a gate via opening. The gate via opening exposes the metal gate layer. A portion of the second dielectric layer is removed to form a contact opening that exposes the first metal layer. The gate via and contact openings merge to form a composite opening. A second metal layer is deposited within the composite opening, thus connecting the metal gate layer to the first metal layer.
Public/Granted literature
- US20200161173A1 CONTACT FORMATION METHOD AND RELATED STRUCTURE Public/Granted day:2020-05-21
Information query
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