SiC Power Device Patent Landscape 2026
SiC Power Device Patent Landscape in 2026
The SiC power device field is in a growth phase—expanding on a multi-year basis with a 43% rise in recent-window filings—though annual volume eased from its 2022 peak and is further understated by publication lag. Wolfspeed commands the single largest position among ranked filers, with the United States as the dominant filing office, while a rising cohort of Chinese and Japanese challengers is reshaping competitive concentration.
Wolfspeed leads a moderately concentrated field with a strong second tier
Wolfspeed holds the top position among ranked filers by a wide margin, followed by Mitsubishi Electric and Fuji Electric. These three incumbents account for the bulk of activity at the top of the ranking, establishing a clear first tier.
The top five filers’ combined share equals 38% of the hundred largest filers’ total patent records, signaling meaningful but not extreme concentration—a second tier of Chinese and automotive-linked players is large enough to exert competitive pressure.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Wolfspeed Inc | 276 | |
| 2 | Mitsubishi Electric Corp | 153 | |
| 3 | Fuji Electric Co Ltd | 90 | |
| 4 | STMicroelectronics (SEMICON COMPONENTS IND LLC) | 45 | |
| 5 | Global Power Tech Co Ltd | 37 | |
| 6 | NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP … | 36 | |
| 7 | General Electric Co | 34 | |
| 8 | UNIV OF ELECTRONICS SCI & TECH OF CHINA | 34 | |
| 9 | Hyundai Motor Co Ltd | 32 | |
| 10 | Infineon Technologies AG | 30 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Panasonic Holdings Corp | 28 | |
| 12 | Sumitomo Electric Industries Ltd | 27 | |
| 13 | Zhuzhou CRRC Times Semiconductor Co Ltd | 25 | |
| 14 | Denso Corp | 24 | |
| 15 | Nanjing Third Generation Semiconductor Technology Innovation Center | 23 | |
| 16 | Nanjing Third Generation Semiconductor Technology Innovation Center | 22 | |
| 17 | Rohm Co Ltd | 21 | |
| 18 | Hangzhou Silicon-Magic Semiconductor Technology Co Ltd | 20 | |
| 19 | Zhuzhou CSR Times Electric Co Ltd | 20 | |
| 20 | Hubei Jiufengshan Laboratory | 20 |
Wolfspeed’s outsized position implies deep defensive coverage of core SiC MOSFET and device architecture IP, making design-around or adjacent-space strategies more viable than direct frontal filing for new entrants.
Filing counts for 2024–2026 are materially understated due to patent publication lag and should not be read as a slowdown in actual R&D activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A 2022 surge defined the growth arc; device-layer IP dominates the technology mix
The annual filing trend and technology composition together reveal where the field’s energy is concentrated and which adjacent branches remain relatively sparse.
Annual filing trend
Filings climbed steadily from 2017 through a pronounced 2022 spike, then moderated in 2023 and 2024; 2025–2026 counts are heavily understated by publication lag and do not reflect a real decline. The multi-year growth window remains positive at 43%.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01L (Semiconductor devices) dominates the IPC mix by a wide margin, reflecting the field’s concentration on device architecture and fabrication. H10D, H02M (power conversion), C30B (crystal growth), and H03K (pulse technique) appear at materially lower shares, marking them as adjacent and comparatively under-served branches.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Silicon carbide mosfet device and method for manuf…
The present disclosure discloses a self-aligned silicon carbide MOSFET device with an optimized P<sup>+ </sup>region and a manufacturing method thereof. The self-aligned silicon carbide MOSFET device is formed by a plurality of silicon carbide MOSFET device cells connected in parallel, and these silicon carbide MOSFET device cells are arranged evenly. The… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Semiconductor device and production method therefor | 449 |
| 2 | Silicon carbide semiconductor device and silicon c… | 412 |
| 3 | Silicon carbide MOSFETs with integrated antiparall… | 250 |
| 4 | Method of forming silicon carbide trench mosfet wi… | 210 |
| 5 | Silicon carbide power devices having trench-based … | 201 |
| 6 | Silicon carbide mosfets with integrated antiparall… | 175 |
| 7 | Method for manufacturing silicon carbide semicondu… | 169 |
| 8 | Vertical JFET limited silicon carbide power metal-… | 162 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the patent structure means for R&D investment decisions
Four structural observations—maturity, concentration, collaboration, and geography—frame the strategic implications for engineering and IP teams evaluating entry or expansion in SiC power devices.
Growth stage with a post-2022 moderation
The field is classified as Growth: the recent three-year filing window is 43% above the prior three-year window. Annual volume peaked in 2022 and has since eased, consistent with a field that has passed its fastest ramp but continues to attract substantial new filings. Teams entering now face an established prior-art base but still have room to stake positions in sub-domains before the field matures further.
Growth · post-peak moderationFirst tier is entrenched; second tier is competitive
The top five filers hold 38% of the hundred largest filers’ combined patent records, with Wolfspeed alone accounting for 276 patent records—nearly double Mitsubishi Electric’s 153. Below the top three, ranks four through ten are closely bunched, including automotive OEMs (Hyundai) and Chinese national-champion institutes, suggesting active competition for second-tier positioning.
Moderate-high concentrationChinese institute–company pairing is the dominant co-filing axis
The most active co-filing relationship is between the No. 55 Institute of the China Electronics Technology Group and the Nanjing Third Generation Semiconductor Technology Innovation Center, with 18 joint records each across two related entities. Hyundai Motor and Kia form a second co-filing cluster with 6 joint records, and Fuji Electric co-files with both the National Institute of Advanced Industrial Science and Technology (3 records) and Toshiba (1 record). These pairings reflect state-backed industrial policy in China and keiretsu-style ecosystem coordination in Japan.
Institute–industry co-filingUS-primary filing with China as a fast-growing second jurisdiction
The United States leads jurisdiction coverage with 789 patent records, followed by China at 495 and EPO at 216. The US–China gap is narrowing as Chinese filers increase domestic and international filings. PCT route activity (117 records) signals that multiple applicants are preserving optionality for multi-region enforcement, particularly in Europe and Asia.
US-led; China risingGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| No. 55 Research Institute, China Electronics Technology Group Corp | Nanjing Third Generation Semiconductor Technology Innovation Center Co Ltd | 18 |
| No. 55 Research Institute, China Electronics Technology Group Corp | Nanjing Third Generation Semiconductor Technology Innovation Center | 18 |
| Hyundai Motor Co Ltd | Kia Corporation | 6 |
| Fuji Electric Co Ltd | National Institute of Advanced Industrial Science and Technology (AIST) | 3 |
| Hyundai Motor Co Ltd | Hyundai Autoron Co Ltd | 2 |
| Fuji Electric Co Ltd | Toshiba Corporation | 1 |
| University of Electronic Science and Technology of China | UESTC Chongqing Microelectronics Industry Technology Research Institute | 1 |
| University of Electronic Science and Technology of China | UESTC Guangdong Electronic Information Engineering Research Institute | 1 |
| University of Electronic Science and Technology of China | Chengdu Senwei Technology Co Ltd | 1 |
| No. 55 Research Institute, China Electronics Technology Group Corp | China FAW Group Co Ltd | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Wolfspeed anchors device-layer IP; STMicroelectronics and Global Power Tech are the fastest-moving challengers
The leader–challenger divide in SiC power devices is defined by depth of device-architecture coverage versus momentum in newer filing periods, with distinct trajectories emerging across Western incumbents and Chinese new entrants.
Wolfspeed Inc
Wolfspeed holds 276 patent records, nearly double its nearest rival, concentrated in H01L 29 (semiconductor device structures) and H01L 21 (fabrication processes). This depth reflects decades of SiC-specific IP accumulation across MOSFET, trench, and vertical JFET architectures. Recent momentum is declining (▼ –63% in the most recent period), suggesting the portfolio is maturing rather than actively expanding, which may open design-around windows in adjacent sub-classes.
patent records: 276STMicroelectronics
STMicroelectronics (ranked fourth with 45 patent records under SEMICON COMPONENTS IND LLC) is the fastest-growing established Western challenger, with momentum at ▲ +47% in the recent period. Its focus spans H01L 29, H01L 21, and H01L 23 (semiconductor packaging), pointing to a strategy that integrates device design with module-level integration. Global Power Tech Co. Ltd and the No. 55 Institute of CETC entered as new filers in the recent window (▲ new entrant), signaling accelerating Chinese state-backed competition.
patent records: 45| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Wolfspeed Inc | 14 | ▼ -63% |
| Mitsubishi Electric Corp | 2 | ▼ -94% |
| Fuji Electric Co Ltd | 8 | ▼ -38% |
| STMicroelectronics | 22 | ▲ +47% |
| University of Electronic Science and Technology of China | 16 | ▼ -6% |
| Global Power Tech Co Ltd (Beijing) | 37 | ▲ new entrant |
| No. 55 Research Institute, China Electronics Technology Group Corp | 21 | ▲ new entrant |
Under-served branches adjacent to the SiC device core
Several IPC branches adjacent to the dominant H01L semiconductor-device cluster carry materially lower patent-record counts, indicating areas where coverage is relatively sparse relative to technical relevance.
H02M · Power Conversion Circuits
With 65 patent records against H01L’s 1,853, H02M (AC/DC and DC/DC power conversion) is sparsely covered relative to its proximity to SiC device applications. SiC MOSFETs and Schottky diodes are deployed specifically to improve converter efficiency; IP covering the integration of SiC devices into converter topologies—gate-drive optimization, switching-loss models, thermal management within converter modules—remains a comparatively open area. Teams with circuit-design competence alongside device expertise are plausibly positioned to file here.
Search this in Eureka →C30B · Crystal Growth & Substrate Engineering
C30B (crystal growth, particularly SiC boule and epitaxial layer growth) shows 62 patent records, a share that is sparse relative to the device-layer total. Substrate quality—micropipe density, polytype control, doping uniformity—is a known bottleneck for SiC device yield and cost, yet IP in this branch is comparatively thin. Entrants with materials-science or epitaxy capabilities may find this branch offers differentiated positions with direct commercial relevance to device manufacturers seeking substrate supply security.
Search this in Eureka →How leading filers differ by technology route
Strength of each leader across the main technology routes.
| Player | H01L 29 · Semiconductor devices | H01L 21 · Semiconductor devices | H01L 27 · Semiconductor devices | H01L 23 · Semiconductor devices | H10D 62 · Semiconductor devices (general) |
|---|---|---|---|---|---|
| Wolfspeed Inc | Strong · 244 | Strong · 164 | Emerging · 38 | Emerging · 20 | Emerging · 7 |
| Mitsubishi Electric Corp | Strong · 116 | Strong · 76 | Emerging · 17 | Emerging · 10 | Emerging · 13 |
| Fuji Electric Co Ltd | Strong · 77 | Strong · 61 | Emerging · 5 | Emerging · 6 | Absent |
| STMicroelectronics | Strong · 40 | Strong · 33 | Emerging · 8 | Moderate · 9 | Emerging · 4 |
| No. 55 Research Institute, China Electronics Technology Group Corp | Strong · 34 | Strong · 29 | Absent | Absent | Absent |
| Global Power Tech Co Ltd (Beijing) | Strong · 36 | Strong · 25 | Absent | Absent | Absent |
| General Electric Co | Strong · 28 | Strong · 31 | Absent | Absent | Absent |
Frequently asked questions
The corpus covers 1,105 patent families. Applicant rankings within this report are measured in patent records, so a single family can contribute multiple records across jurisdictions or classifications.
Wolfspeed Inc holds the top position with 276 patent records among the ranked filers, nearly double the 153 patent records held by the second-ranked Mitsubishi Electric Corp.
The field is classified as Growth. Recent three-year filings are 43% above the prior three-year window. Annual volume peaked in 2022 and has moderated since, but the multi-year trend remains positive. The most recent filing years are additionally understated by patent publication lag.
The United States leads with 789 patent records, followed by China with 495 and the European Patent Office with 216. WIPO PCT filings stand at 117, and Japan accounts for 61 patent records.
Among tracked applicants, STMicroelectronics shows ▲ +47% momentum in the recent period. Global Power Tech Co. Ltd and the No. 55 Institute of the China Electronics Technology Group both entered as new filers in the recent window. By contrast, Wolfspeed’s recent filings are down ▼ -63% and Mitsubishi Electric’s are down ▼ -94%, suggesting those portfolios are consolidating rather than expanding.
The most-cited work covers semiconductor device production methods (449 citations), silicon carbide semiconductor devices (412 citations), SiC MOSFETs with integrated antiparallel Schottky diodes (250 and 175 citations across two related filings), trench MOSFET formation methods (210 citations), and vertical JFET-limited SiC power MOSFET architectures (162 citations). These represent the foundational device-architecture and process IP in the field.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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