Invention Grant
- Patent Title: Stress-controlled formation of tin hard mask
- Patent Title (中): 应力控制形成锡硬掩模
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Application No.: US13925495Application Date: 2013-06-24
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Publication No.: US08975187B2Publication Date: 2015-03-10
- Inventor: Rueijer Lin , Chun-Chieh Lin , Hung-Wen Su , Minghsing Tsai
- Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Haynes and Boone, LLP
- Main IPC: H01L21/311
- IPC: H01L21/311 ; B81C1/00 ; B81B7/00 ; H01L21/308

Abstract:
Disclosed is a method to form a titanium nitride (TiN) hard mask in the Damascene process of forming interconnects during the fabrication of a semiconductor device, while the type and magnitude of stress carried by the TiN hard mask is controlled. The TiN hard mask is formed in a multi-layered structure where each sub-layer is formed successively by repeating a cycle of processes comprising TiN and chlorine PECVD deposition, and N2/H2 plasma gas treatment. During its formation, the stress to be carried by the TiN hard mask is controlled by controlling the number of TiN sub-layers and the plasma gas treatment duration such that the stress may counter-balance predetermined external stress anticipated on a conventionally made TiN hard mask, which causes trench sidewall distortion, trench opening shrinkage, and gap filling problem.
Public/Granted literature
- US20140273470A1 Stress-Controlled Formation of Tin Hard Mask Public/Granted day:2014-09-18
Information query
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