- Patent Title: Modulated deposition process for stress control in thick TiN films
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Application No.: US13680270Application Date: 2012-11-19
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Publication No.: US08575752B2Publication Date: 2013-11-05
- Inventor: Gregory Charles Herdt , Joseph W. Buckfeller
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Jacqueline J. Garner; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H01L23/532
- IPC: H01L23/532

Abstract:
A multi-layer TiN film with reduced tensile stress and discontinuous grain structure, and a method of fabricating the TiN film are disclosed. The TiN layers are formed by PVD or IMP in a nitrogen plasma. Tensile stress in a center layer of the film is reduced by increasing N2 gas flow to the nitrogen plasma, resulting in a Ti:N stoichiometry between 1:2.1 to 1:2.3. TiN films thicker than 40 nanometers without cracks are attained by the disclosed process.
Public/Granted literature
- US20130075910A1 MODULATED DEPOSITION PROCESS FOR STRESS CONTROL IN THICK TiN FILMS Public/Granted day:2013-03-28
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