Invention Grant
- Patent Title: FinFET spacer without substrate gouging or spacer foot
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Application No.: US14568287Application Date: 2014-12-12
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Publication No.: US09793379B2Publication Date: 2017-10-17
- Inventor: Veeraraghavan S. Basker , Kangguo Cheng , Ali Khakifirooz , Raghavasimhan Sreenivasan
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Steven J. Meyers; Daniel M. Cohn; Howard M. Cohn
- Main IPC: H01L29/66
- IPC: H01L29/66 ; H01L21/8234

Abstract:
The present invention relates generally to semiconductor devices, and more particularly, to a structure and method of forming a spacer adjacent to a gate in a fin field effect transistor (FinFET) device without resulting in substrate gouging or a spacer foot. A conformal spacer layer may be formed around a plurality of fins and a gate, wherein the conformal spacer layer may have a thickness above the plurality of fins that is at least one-half the distance between the individual fins. An isotropic etch may be used to remove excess spacer material around the plurality of fins (but not between the fins) and around the gate. An anisotropic etch may be used to remove the remaining spacer material from between the fins and around the gate, leaving a spacer adjacent to the gate without gouging the substrate surface between the fins.
Public/Granted literature
- US20160172460A1 FINFET SPACER WITHOUT SUBSTRATE GOUGING OR SPACER FOOT Public/Granted day:2016-06-16
Information query
IPC分类: