Cited by 1,176Silicon Carbide Semiconductor TechnologiesGaN-based semiconductor devices and materialsGa2O3 and related materials

Material Science and Device Physics in SiC Technology for High-Voltage Power Devices

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Kimoto, Tsunenobu·2015·Japanese Journal of Applied Physics

Abstract

Power semiconductor devices are key components in power conversion systems. Silicon carbide (SiC) has received increasing attention as a wide-bandgap semiconductor suitable for high-voltage and low-loss power devices. Through recent progress in the crystal growth and process technology of SiC, the production of medium-voltage (600–1700 V) SiC Schottky barrier diodes (SBDs) and power metal–oxide–semiconductor field-effect transistors (MOSFETs) has started. However, basic understanding of the material properties, defect electronics, and the reliability of SiC devices is still poor. In this review paper, the features and present status of SiC power devices are briefly described. Then, several important aspects of the material science and device physics of SiC, such as impurity doping, extended and point defects, and the impact of such defects on device performance and reliability, are reviewed. Fundamental issues regarding SiC SBDs and power MOSFETs are also discussed.

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  • Wide-bandgap semiconductors, including SiC and GaN, enable high-voltage, high-temperature, and high-speed switching owing to their wide bandgap, nearly tenfold higher critical electric field, and superior thermal conductivity.

    “To address these challenges, Wide-Bandgap (WBG) semiconductors, including silicon carbide (SiC) and gallium nitride (GaN), have emerged as materials that enable high-voltage, high-temperature, and high-speed switching owing to their Wide-Bandgap, nearly tenfold higher critical electric field, and superior thermal conductivity [1,2].”

    From Thermal Management of Wide-Bandgap Power Semiconductors: Strategies and Challenges in SiC and GaN Power Devices (2025) · cites this paper as [2]

    The Introduction identifies both SiC and GaN as wide-bandgap semiconductors, but the detailed device-property evidence concerns SiC. Table I in §2 compares SiC’s breakdown field and thermal conductivity with silicon’s, and §4 describes an approximately 8–10-fold higher breakdown field for 4H- and 6H-SiC. The source does not establish those quantitative and thermal properties, or high-voltage and high-temperature switching, for GaN; it instead describes GaN lateral switches as promising for relatively low-voltage applications. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Wide-bandgap semiconductors are positioned to overcome key constraints of Si technologies in electric vehicles, aerospace, and renewable energy.

    “Accordingly, WBG semiconductors are positioned to overcome key constraints of Si technologies in electric vehicles, aerospace, and renewable energy [2,3].”

    From Thermal Management of Wide-Bandgap Power Semiconductors: Strategies and Challenges in SiC and GaN Power Devices (2025) · cites this paper as [2]

    The Introduction (page not available) says Si technology is mature and difficult to improve substantially, while identifying electric and hybrid vehicles as applications for power devices. The Introduction and §2 describe advantages of wide-bandgap SiC for high-voltage, low-loss devices. Our copy does not specifically connect those advantages to aerospace or renewable-energy applications, so the full list of settings is not supported by this source. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • SiC and GaN can operate under high-voltage and high-temperature conditions thanks to their wide bandgaps (2.9-3.4 eV) and critical electric field strengths (2.2-4 MV cm-1), outperforming conventional Si in these regimes.

    “SiC and GaN can operate under high-voltage and high-temperature conditions thanks to their Wide-Bandgaps (2.9-3.4 eV) and critical electric field strengths (2.2-4 MV cm -1 ), outperforming conventional Si in these regimes [2-5].”

    From Thermal Management of Wide-Bandgap Power Semiconductors: Strategies and Challenges in SiC and GaN Power Devices (2025) · cites this paper as [2]

    The Introduction identifies both SiC and GaN as wide-bandgap semiconductors, while §2 says SiC devices operate at high temperatures and §4 reports higher breakdown-field strengths for SiC than for Si. The paper gives SiC bandgaps of 3.02 and 3.26 eV, but the cited passages do not establish the claimed 2.9–3.4 eV and 2.2–4 MV cm⁻¹ ranges for both materials or GaN’s high-temperature operation. No page numbers are available in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • SiC exhibits high thermal conductivity (3.3-4.9 W cm-1 K-1; approximately 330-490 W m-1 K-1), enabling superior heat removal.

    “SiC exhibits high thermal conductivity (3.3-4.9 W cm -1 K -1 ; approximately 330-490 W m -1 K -1 ), enabling superior heat removal.”

    From Thermal Management of Wide-Bandgap Power Semiconductors: Strategies and Challenges in SiC and GaN Power Devices (2025) · cites this paper as [2]

    The Introduction states that SiC has high thermal conductivity. Section 2 says SiC devices can avoid bulky cooling units, but attributes that advantage to their wide bandgap and chemical stability rather than thermal conductivity. The passages do not give the claimed 3.3–4.9 W cm⁻¹ K⁻¹ range. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • SiC in GaN-on-SiC offers a significant thermal advantage, exhibiting high thermal conductivity of 3.3-4.9 W cm-1 K-1 (approximately 330-490 W m-1 K-1).

    “For substrates, SiC (in GaNon-SiC) offers a significant thermal advantage, exhibiting high thermal conductivity of 3.3-4.9 W cm -1 K -1 (approximately 330-490 W m -1 K -1 ).”

    From Thermal Management of Wide-Bandgap Power Semiconductors: Strategies and Challenges in SiC and GaN Power Devices (2025) · cites this paper as [2]

    The Introduction describes SiC as having high thermal conductivity and says its conductivity is about three times that of silicon. The passages from our copy do not give the claimed 3.3–4.9 W cm⁻¹ K⁻¹ range or establish a thermal advantage specifically for GaN-on-SiC substrates. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

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Authors
Kimoto, T.
Affiliations
Kyoto University (JP)
Corresponding author
Kimoto, Tsunenobu
Venue
Japanese Journal of Applied Physics
Published
2015-03-23
Volume
54
Issue
4
Pages
040103
ISSN
  • 0021-4922 (ISSN-L)
  • 1347-4065
OpenAlex
W2092874501
Cited by
1,176
References
304
Citations by year
2026: 112 · 2025: 129 · 2024: 132 · 2023: 104 · 2022: 113 · 2021: 115 · 2020: 104 · 2019: 116 · 2018: 109 · 2017: 76 · 2016: 51 · 2015: 14 · 2013: 1
FWCI
40.18
Type
journal article
Language
en
Open access
Locations
Japanese Journal of Applied Physics (publishedVersion)
Funders
  • Kwansei Gakuin University
  • Soochow University
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Silicon Carbide Semiconductor Technologies
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › GaN-based semiconductor devices and materials
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Ga2O3 and related materials
Keywords
silicon carbide, wide bandgap semiconductors, high-voltage power devices, Schottky diodes, SiC MOSFET, impurity doping, point defects, extended defects, device reliability, power semiconductor devices

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