SiC Efficiency & Sustainability Patent Landscape 2026
The SiC efficiency and sustainability patent field is in a growth phase on a multi-year basis, with the field still expanding well above its prior three-year window, though annual volume eased from a 2022 peak. Canon leads the applicant ranking, but the top five filers account for only one-fifth of the hundred largest filers’ combined total, indicating a moderately fragmented competitive field.
Canon leads a moderately fragmented field with Japanese and US players dominating the top tier
Canon sits at the head of the applicant ranking, followed closely by Sumitomo Electric Industries and NGK Insulators, with Hitachi and CTM Magnetics rounding out the top five. The proximity of these scores signals a competitive top tier rather than a single dominant incumbent.
The top five filers together account for roughly one-fifth of the combined patent records held by the hundred largest filers, confirming moderate concentration. No single entity commands a decisive lead, and the gap between first and fifth place is narrow, leaving the ranking open to disruption.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Canon Inc. | 36 | |
| 2 | Sumitomo Electric Industries, Ltd. | 34 | |
| 3 | NGK Insulators, Ltd. | 22 | |
| 4 | Hitachi, Ltd. | 21 | |
| 5 | CTM Magnetics Inc. | 21 | |
| 6 | NGK Adrec Co., Ltd. | 19 | |
| 7 | Corning Incorporated | 19 | |
| 8 | Denso Corporation | 18 | |
| 9 | Mitsubishi Electric Corporation | 16 | |
| 10 | North Carolina State University | 15 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Pallidus Inc. | 15 | |
| 12 | Ibiden Co., Ltd. | 14 | |
| 13 | Kennecott Copper Corp. | 14 | |
| 14 | The Kansai Electric Power Co., Inc. | 13 | |
| 15 | Kiselkarbid i Stockholm AB | 12 | |
| 16 | South China University of Technology | 11 | |
| 17 | Sandvik Materials Technology UK | 10 | |
| 18 | Fujian Yongjing Technology Co., Ltd. | 10 | |
| 19 | Suzhou Nikex Automotive Parts Co., Ltd. | 10 | |
| 20 | Whitford Ltd. | 10 |
The presence of Japanese industrial conglomerates, US specialty-materials firms, and academic institutions such as North Carolina State University in the top twenty suggests the technology remains contested across corporate and research-institution boundaries, with multiple viable entry points for challengers.
Filing counts for the most recent 18–24 months are likely understated due to standard patent publication lag and should not be read as a slowdown. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A 2022 surge reshaped the corpus; semiconductor and ceramics classes dominate the technology mix
The annual filing trend reveals an uneven but upward multi-year trajectory, while the technology composition chart shows that semiconductor device and ceramics classes anchor the corpus, with power-conversion and crystal-growth branches adding meaningful secondary coverage.
Annual filing trend
Annual filings climbed from the late 2010s to a pronounced peak in 2022, then moderated. The three-year recent window sits 54% above the prior three-year window, confirming multi-year growth despite the post-peak easing. Counts for 2024–2026 are suppressed by publication lag and will revise upward.
↗ Hover for values · click a bar to ask EurekaTechnology composition
Semiconductor devices (H01L) and ceramics and refractories (C04B) are the two largest IPC branches, reflecting SiC’s dual role in power electronics and structural/thermal applications. Crystal growth (C30B), power conversion (H02M), and furnace technology (F27D, H05B) form a substantial secondary cluster, pointing to active upstream materials and processing work alongside device-level innovation.
↗ 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.
Method for preventing decomposition of silicon car…
A system to prevent, retard or reverse the decomposition of silicon carbide articles during high temperature plasma sintering. Preferably, the system comprises sintering a silicon carbide refractory or ceramic green body in a closed sintering environment, such as a closed tube, with strategic placement of the plasma torch or torches, exhaust outlet and… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Sublimation of silicon carbide to produce large, d… | 332 |
| 2 | Method of forming a heterojunction of a carbon nan… | 182 |
| 3 | Foodware with ceramic food contacting surface | 145 |
| 4 | Process for producing carbon nanotubes, process fo… | 122 |
| 5 | Apparatus and method for thermal processing of sem… | 117 |
| 6 | Process for producing carbon nanotubes, process fo… | 70 |
| 7 | Process for the preparation of thick-walled cerami… | 67 |
| 8 | Method of making an electron beam window | 66 |
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 competitive structure means for R&D investment decisions
The field’s moderate concentration, multi-year growth trajectory, and broad technology spread across materials, devices, and power systems create distinct strategic entry and partnership opportunities for new and established players alike.
Growth phase with easing annual peaks — early-mover advantage still available
The lifecycle sits in the Growth stage: recent three-year filings are 54% above the prior three-year window, confirming the field is still expanding on a multi-year basis. Annual volume eased from its 2022 peak, and the most recent filing years are further understated by publication lag. Teams entering now can still establish foundational positions before the field consolidates.
Growth stageModerate fragmentation leaves the ranking contestable
The top five filers — Canon, Sumitomo Electric Industries, NGK Insulators, Hitachi, and CTM Magnetics — hold roughly one-fifth of the combined patent records of the hundred largest filers. The narrow gap between first and fifth place means no single firm has built an insurmountable lead, and a focused filing program in an under-served sub-branch could realistically shift the rankings within a few years.
Moderate concentrationNGK Insulators–NGK Adrec partnership anchors the strongest co-filing relationship
The most active collaboration pair is NGK Insulators and NGK Adrec Co. Ltd., which share 19 co-filed patent records — well above any other pair in the corpus. Sumitomo Electric Industries co-files with individual researchers Yamada Osamu, Koizumi Mitsue, and Miyamoto Kinsei, each at two records. South China University of Technology and Shenzhen Huaqiang Electric Technology Co. Ltd. also co-file, as do Kennecott and The Carborundum Company. Cross-sector and academic–industrial partnerships remain relatively sparse, suggesting an opportunity for new collaborative arrangements.
Targeted collaborationUS leads protection activity; Asia and Europe are important secondary markets
The United States is the dominant filing jurisdiction by a clear margin. Europe (EPO) and Japan represent substantial secondary markets, followed by China and India, with WIPO PCT filings suggesting applicants are actively pursuing multi-jurisdiction coverage. South Korea, Canada, and the UK round out the next tier. Competitors seeking broad freedom-to-operate should prioritize at minimum the US, EPO, and Japanese filing routes.
US-led, multi-jurisdictionGo 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 |
|---|---|---|
| NGK Insulators, Ltd. | NGK Adrec Co., Ltd. | 19 |
| Sumitomo Electric Industries, Ltd. | Yamada Osamu | 2 |
| Sumitomo Electric Industries, Ltd. | Koizumi Mitsue | 2 |
| Sumitomo Electric Industries, Ltd. | Miyamoto Kinsei | 2 |
| South China University of Technology | Shenzhen Huaqiang Electric Technology Co., Ltd. | 2 |
| Kennecott Copper Corp. | The Carborundum Company | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Canon and Sumitomo Electric diverge sharply in technology focus despite similar patent-record counts
The two leading filers — Canon and Sumitomo Electric Industries — hold comparable record counts but pursue entirely different technology routes, illustrating the breadth of the SiC application space and the absence of a single dominant paradigm.
Canon
Canon leads the ranking with 36 patent records and focuses primarily on printing and imaging applications of SiC-related materials — its top sub-classes are typewriters and printers (B41J 2), coatings and inks (C09D 11), and electrophotography (G03G 15). Momentum data classifies Canon as a new entrant in the recent filing window, suggesting recent strategic pivot rather than a legacy position in power-electronics SiC.
patent records: 36Sumitomo Electric Industries
Sumitomo Electric Industries is the closest challenger at 34 patent records and is concentrated squarely in semiconductor device classes (H01L 29 and H01L 21) and general semiconductor devices (H10D 30), reflecting a power-electronics and SiC wafer strategy. Its co-filings with individual researchers indicate an active internal development pipeline, and its technology focus aligns closely with the field’s largest IPC branch.
patent records: 34| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Canon Inc. | 2 | ▲ new entrant |
| Grant A. MacLennan | 1 | ▲ new entrant |
| South China University of Technology | 3 | ▲ new entrant |
Under-served adjacent branches in crystal growth, power conversion, and furnace technology
Several IPC branches carry meaningful patent-record activity relative to the dominant semiconductor and ceramics classes but hold proportionally lower shares of the corpus, signalling areas where the prior art base is thinner and differentiated filings may face less crowding.
C30B · Crystal growth
Crystal growth methods for SiC substrates account for a notable share of records yet represent only 5% of the top-100-filer combined total, making it one of the sparser branches relative to its technical importance. High-quality boule and epitaxial layer growth directly governs device efficiency and defect density — the most-cited patent in the corpus is a sublimation-based SiC crystal growth method, confirming foundational relevance. Teams with process chemistry or thermal-management expertise could enter via novel seeding or vapor-transport approaches with less direct prior-art overlap than in the device classes.
Search this in Eureka →H02M · Power conversion (AC/DC etc.)
Power conversion circuitry accounts for 60 patent records and a 4% share among the top 100 filers’ combined total, a relatively modest position given that SiC switches are the primary driver of efficiency gains in inverters, DC-DC converters, and EV charging systems. The individual researcher MACLENNAN GRANT A focuses almost exclusively on H02M 1 and H01F (magnetics), and South China University of Technology also shows H02M activity — but no large industrial incumbent dominates this branch. A focused program linking SiC device characteristics to converter topology optimization represents a technically plausible entry path with limited crowding from the current leaders.
Search this in Eureka →How leading applicants diverge across SiC technology routes
Route coverage across the main technology branches in the current evidence set.
| Player | C04B 35 · Ceramics, cement & refractories | H01L 21 · Semiconductor devices | H01L 29 · Semiconductor devices | C30B 29 · Crystal growth | H02M 1 · Power conversion (AC/DC etc.) |
|---|---|---|---|---|---|
| Sumitomo Electric Industries, Ltd. | Absent | Strong · 17 | Strong · 27 | Absent | Absent |
| The Kansai Electric Power Co., Inc. | Absent | Strong · 12 | Strong · 13 | Absent | Absent |
| Central Research Institute of Electric Power Industry | Absent | Strong · 12 | Strong · 12 | Absent | Absent |
| NGK Insulators, Ltd. | Strong · 22 | Absent | Absent | Absent | Absent |
| NGK Adrec Co., Ltd. | Strong · 19 | Absent | Absent | Absent | Absent |
| Mitsubishi Electric Corporation | Absent | Strong · 11 | Strong · 7 | Absent | Absent |
| Hitachi, Ltd. | Absent | Moderate · 5 | Strong · 10 | Absent | Moderate · 3 |
Frequently asked questions
The corpus covers 318 patent families in scope. The applicant ranking is based on patent records, which can exceed the family count because a single family may be counted across multiple IPC classes or jurisdictions.
Canon leads the applicant ranking with 36 patent records, followed by Sumitomo Electric Industries with 34. The two leaders are separated by only two records, indicating a highly competitive top tier.
The field is in a Growth lifecycle stage with recent three-year filings 54% above the prior three-year window. The 2022 spike and subsequent multi-year expansion reflect rising industrial interest in SiC for power electronics, EV drivetrains, and high-temperature materials applications.
The United States is the dominant jurisdiction by patent-record count, with Europe (EPO), Japan, China, and India forming the next tier. PCT (WIPO) filings indicate active multi-jurisdiction coverage strategies by leading applicants.
The most-cited document in the corpus relates to sublimation of silicon carbide to produce large-diameter crystals, with 332 citations, pointing to upstream crystal-growth IP as foundational. A method for forming a carbon nanotube heterojunction (182 citations) and a thermal processing apparatus for semiconductors (117 citations) are also among the most heavily referenced works.
Crystal growth (C30B) and power conversion (H02M) each hold roughly 4–5% of the top-100-filer combined total despite their direct relevance to SiC device performance. Furnace technology (F27D) and electric heating circuits (H05B) are similarly sparse at 4% each, making them plausible targets for differentiated filings.
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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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