Invention Grant
- Patent Title: Contact formation for semiconductor device
- Patent Title (中): 半导体器件的触点形成
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Application No.: US14609171Application Date: 2015-01-29
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Publication No.: US09362279B1Publication Date: 2016-06-07
- Inventor: Ruilong Xie , Andy Wei , William James Taylor , Ryan Ryoung-han Kim , Kwan-Yong Lim , Chanro Park
- Applicant: GLOBALFOUNDRIES Inc.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Heslin Rothenberg Farley & Mesiti, P.C.
- Agent Wayne F. Reinke, Esq.
- Main IPC: H01L27/088
- IPC: H01L27/088 ; H01L29/66 ; H01L21/762 ; H01L21/02 ; H01L21/8234 ; H01L29/417

Abstract:
A method of contact formation and resulting structure is disclosed. The method includes providing a starting semiconductor structure, the structure including a semiconductor substrate with fins coupled to the substrate, a bottom portion of the fins being surrounded by a first dielectric layer, dummy gates covering a portion of each of the fins, spacers and a cap for each dummy gate, and a lined trench between the gates extending to and exposing the first dielectric layer. The method further includes creating an epitaxy barrier of hard mask material between adjacent fins in the trench, creating N and P type epitaxial material on the fins adjacent opposite sides of the barrier, and creating sacrificial semiconductor epitaxy over the N and P type epitaxial material, such that subsequent removal thereof can be done selective to the N and P type of epitaxial material. The resulting structure has replacement (conductive) gates, conductive material above the N and P type epitaxy, and a contact to the conductive material for each of N and P type epitaxy.
Information query
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