The interface properties and energy band alignment of SiO2/GaN metal-oxide-semiconductor (MOS) structures fabricated on N-polar GaN() substrates were investigated by electrical measurements and synchrotron-radiation x-ray photoelectron spectroscopy. They were then compared with those of SiO2/GaN MOS structures on Ga-polar GaN(0001). Although the SiO2/GaN() structure was found to be more thermally unstable than that on the GaN(0001) substrate, excellent electrical properties were obtained for the SiO2/GaN() structure by optimizing conditions for post-deposition annealing. However, the conduction band offset for SiO2/GaN() was smaller than that for SiO2/GaN(0001), leading to increased gate leakage current. Therefore, caution is needed when using N-polar GaN() substrates for MOS device fabrication.
Skip Nav Destination
,
,
,
,
,
,
,
Article navigation
8 August 2022
Research Article|
August 09 2022
Electrical properties and energy band alignment of SiO2/GaN metal-oxide-semiconductor structures fabricated on N-polar GaN() substrates
Hidetoshi Mizobata
;
Hidetoshi Mizobata
a)
(Data curation, Formal analysis, Investigation, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Graduate School of Engineering, Osaka University
, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for other works by this author on:
Kazuki Tomigahara;
Kazuki Tomigahara
(Data curation, Formal analysis, Investigation, Validation, Visualization)
1
Graduate School of Engineering, Osaka University
, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for other works by this author on:
Mikito Nozaki;
Mikito Nozaki
(Data curation, Formal analysis, Investigation)
1
Graduate School of Engineering, Osaka University
, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for other works by this author on:
Takuma Kobayashi
;
Takuma Kobayashi
(Formal analysis, Investigation, Writing – review & editing)
1
Graduate School of Engineering, Osaka University
, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for other works by this author on:
Akitaka Yoshigoe
;
Akitaka Yoshigoe
(Investigation, Resources)
2
Japan Atomic Energy Agency
, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
Search for other works by this author on:
Takuji Hosoi
;
Takuji Hosoi
(Conceptualization, Formal analysis, Investigation, Project administration, Writing – review & editing)
1
Graduate School of Engineering, Osaka University
, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for other works by this author on:
Takayoshi Shimura
;
Takayoshi Shimura
(Formal analysis, Investigation)
1
Graduate School of Engineering, Osaka University
, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for other works by this author on:
Heiji Watanabe
Heiji Watanabe
a)
(Conceptualization, Formal analysis, Investigation, Project administration, Supervision, Writing – review & editing)
1
Graduate School of Engineering, Osaka University
, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for other works by this author on:
Hidetoshi Mizobata
1,a)
Kazuki Tomigahara
1
Mikito Nozaki
1
Takuma Kobayashi
1
Akitaka Yoshigoe
2
Takuji Hosoi
1
Takayoshi Shimura
1
Heiji Watanabe
1,a)
1
Graduate School of Engineering, Osaka University
, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
2
Japan Atomic Energy Agency
, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
Appl. Phys. Lett. 121, 062104 (2022)
Article history
Received:
April 11 2022
Accepted:
July 22 2022
Citation
Hidetoshi Mizobata, Kazuki Tomigahara, Mikito Nozaki, Takuma Kobayashi, Akitaka Yoshigoe, Takuji Hosoi, Takayoshi Shimura, Heiji Watanabe; Electrical properties and energy band alignment of SiO2/GaN metal-oxide-semiconductor structures fabricated on N-polar GaN() substrates. Appl. Phys. Lett. 8 August 2022; 121 (6): 062104. https://doi.org/10.1063/5.0095468
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Roadmap on photonic metasurfaces
Sebastian A. Schulz, Rupert. F. Oulton, et al.
Charge localization in optoelectronic and photocatalytic applications: Computational perspective
Francesco Ambrosio, Julia Wiktor
Diamagnetic levitation of water realized with a simple device consisting of ordinary permanent magnets
Tomoya Naito, Tomoaki Suzuki, et al.
Related Content
Improvement of recessed MOS gate characteristics in normally-off AlN/GaN MOS-HFETs with N 2 / NH 3 thermal treatment
Appl. Phys. Lett. (December 2024)
Theoretical study of the influence of GaOx interfacial layer on the GaN/SiO2 interface property
J. Appl. Phys. (May 2024)
Interface and oxide trap states of SiO2/GaN metal–oxide–semiconductor capacitors and their effects on electrical properties evaluated by deep level transient spectroscopy
J. Appl. Phys. (September 2023)
A systematic and quantitative analysis of the bulk and interfacial properties of the AlSiO dielectric on N-polar GaN using capacitance–voltage methods
J. Appl. Phys. (August 2020)
Characterization of MOCVD-grown AlSiO gate dielectric on β-Ga2O3 (001)
Appl. Phys. Lett. (April 2021)