Invention Grant
- Patent Title: Wrap-around contact for finFET
- Patent Title (中): finFET的缠绕接头
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Application No.: US14849335Application Date: 2015-09-09
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Publication No.: US09478622B2Publication Date: 2016-10-25
- Inventor: Hong Yu , Jinping Liu
- Applicant: GLOBALFOUNDRIES Inc.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Williams Morgan, P.C.
- Main IPC: H01L29/417
- IPC: H01L29/417 ; H01L29/40 ; H01L21/768 ; H01L29/66 ; H01L29/49 ; H01L21/311 ; H01L29/78 ; H01L21/02

Abstract:
Embodiments of the present invention provide an improved contact formation process for a finFET. Epitaxial semiconductor regions are formed on the fins. A contact etch stop layer (CESL) is deposited on the epitaxial regions. A nitride-oxide conversion process converts a portion of the nitride CESL into oxide. The oxide-converted portions are removed using a selective etch process, and a fill metal is deposited which is in direct physical contact with the epitaxial regions. Damage, such as gouging, of the epitaxial regions is minimized during this process, resulting in an improved contact for finFETs.
Public/Granted literature
- US20150380502A1 METHOD TO FORM WRAP-AROUND CONTACT FOR FINFET Public/Granted day:2015-12-31
Information query
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