In this work, β-Ga2O3 fin field-effect transistors (FinFETs) with metalorganic chemical vapor deposition grown epitaxial Si-doped channel layer on (010) semi-insulating β-Ga2O3 substrates are demonstrated. β-Ga2O3 fin channels with smooth sidewalls are produced by the plasma-free metal-assisted chemical etching (MacEtch) method. A specific on-resistance (Ron,sp) of 6.5 mΩ·cm2 and a 370 V breakdown voltage are achieved. In addition, these MacEtch-formed FinFETs demonstrate DC transfer characteristics with near zero (9.7 mV) hysteresis. The effect of channel orientation on threshold voltage, subthreshold swing, hysteresis, and breakdown voltages is also characterized. The FinFET with channel perpendicular to the [102] direction is found to exhibit the lowest subthreshold swing and hysteresis.
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β-Ga2O3 FinFETs with ultra-low hysteresis by plasma-free metal-assisted chemical etching
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1 August 2022
Research Article|
August 01 2022
β-Ga2O3 FinFETs with ultra-low hysteresis by plasma-free metal-assisted chemical etching
Hsien-Chih Huang
;
Hsien-Chih Huang
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Validation, Writing – original draft, Writing – review & editing)
1
Department of Electrical and Computer Engineering, Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign
, Urbana, Illinois 61801, USA
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Zhongjie Ren
;
Zhongjie Ren
(Data curation)
2
Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas
, Austin, Texas 78758, USA
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A F M Anhar Uddin Bhuiyan;
A F M Anhar Uddin Bhuiyan
(Data curation)
3
Department of Electrical and Computer Engineering, The Ohio State University
, Columbus, Ohio 43210, USA
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Zixuan Feng;
Zixuan Feng
(Data curation)
3
Department of Electrical and Computer Engineering, The Ohio State University
, Columbus, Ohio 43210, USA
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Zhendong Yang
;
Zhendong Yang
(Data curation)
2
Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas
, Austin, Texas 78758, USA
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Xixi Luo;
Xixi Luo
(Data curation)
2
Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas
, Austin, Texas 78758, USA
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Alex Q. Huang
;
Alex Q. Huang
(Supervision)
2
Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas
, Austin, Texas 78758, USA
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Andrew Green;
Andrew Green
(Resources)
4
Air Force Research Laboratory
, Sensors Directorate, WPAFB, Ohio 45433, USA
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Kelson Chabak;
Kelson Chabak
(Resources, Writing – review & editing)
4
Air Force Research Laboratory
, Sensors Directorate, WPAFB, Ohio 45433, USA
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Hongping Zhao
;
Hongping Zhao
(Data curation, Funding acquisition, Supervision, Writing – review & editing)
3
Department of Electrical and Computer Engineering, The Ohio State University
, Columbus, Ohio 43210, USA
5
Department of Materials Science and Engineering
, The Ohio State University, Columbus Ohio 43210, USA
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Xiuling Li
Xiuling Li
a)
(Conceptualization, Funding acquisition, Project administration, Supervision, Writing – original draft, Writing – review & editing)
1
Department of Electrical and Computer Engineering, Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign
, Urbana, Illinois 61801, USA
2
Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas
, Austin, Texas 78758, USA
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Hsien-Chih Huang
1
Zhongjie Ren
2
A F M Anhar Uddin Bhuiyan
3
Zixuan Feng
3
Zhendong Yang
2
Xixi Luo
2
Alex Q. Huang
2
Andrew Green
4
Kelson Chabak
4
Hongping Zhao
3,5
Xiuling Li
1,2,a)
1
Department of Electrical and Computer Engineering, Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign
, Urbana, Illinois 61801, USA
2
Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas
, Austin, Texas 78758, USA
3
Department of Electrical and Computer Engineering, The Ohio State University
, Columbus, Ohio 43210, USA
4
Air Force Research Laboratory
, Sensors Directorate, WPAFB, Ohio 45433, USA
5
Department of Materials Science and Engineering
, The Ohio State University, Columbus Ohio 43210, USA
a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 121, 052102 (2022)
Article history
Received:
April 19 2022
Accepted:
July 10 2022
Citation
Hsien-Chih Huang, Zhongjie Ren, A F M Anhar Uddin Bhuiyan, Zixuan Feng, Zhendong Yang, Xixi Luo, Alex Q. Huang, Andrew Green, Kelson Chabak, Hongping Zhao, Xiuling Li; β-Ga2O3 FinFETs with ultra-low hysteresis by plasma-free metal-assisted chemical etching. Appl. Phys. Lett. 1 August 2022; 121 (5): 052102. https://doi.org/10.1063/5.0096490
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