SiC Power Module Packaging Patent Landscape 2026
SiC power module packaging is in a growth phase, with the field expanding 47% over the recent window and activity concentrated among a small group of materials specialists and device makers. Denka and Wolfspeed hold the top two positions, together accounting for a substantial share of filings, while Chinese universities and domestic firms are accelerating as new entrants.
Denka and Wolfspeed lead a moderately concentrated field
Denka Co Ltd ranks first among all filers, followed closely by Wolfspeed Inc, with Mitsubishi Materials Corp and Semicon Components Industrial third and fourth. The top five filers account for 40% of the combined total across the hundred largest filers, signaling meaningful but not extreme concentration.
A clear tier gap separates the top two from the rest: Denka and Wolfspeed together hold a commanding lead over Mitsubishi Materials Corp, Semicon Components Industrial, and Rohm Co Ltd, who cluster in a second tier. Below that, activity disperses broadly across Japanese conglomerates, European device makers, and Chinese academic institutions.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Denka Co Ltd | 67 | |
| 2 | Wolfspeed Inc | 63 | |
| 3 | Mitsubishi Materials Corp | 29 | |
| 4 | Semicon Components Industrial LLC | 28 | |
| 5 | Rohm Co Ltd | 24 | |
| 6 | Sumitomo Electric Industries Ltd | 19 | |
| 7 | A.L.M.T. Corp | 18 | |
| 8 | Hitachi Ltd | 13 | |
| 9 | Xi’an Jiaotong University | 12 | |
| 10 | HUAZHONG UNIV OF SCI & TECH | 12 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Yangzhou Guoyang Electronics Co Ltd | 11 | |
| 12 | Mitsubishi Electric Corp | 10 | |
| 13 | Fuji Electric Co Ltd | 10 | |
| 14 | Infineon Technologies AG | 10 | |
| 15 | Honda Motor Co Ltd | 9 | |
| 16 | MACOM Technology Solutions Holdings Inc | 7 | |
| 17 | Xidian University | 7 | |
| 18 | Microsemi Corp | 6 | |
| 19 | STMicroelectronics International NV | 6 | |
| 20 | Minebea Power Semiconductor Device Inc | 6 |
The leaders’ positions reflect differentiated strategies: Denka’s dominance is rooted in ceramic substrate materials, while Wolfspeed’s strength lies in SiC device architecture. This divergence means the top two are not direct substitutes and that challengers can compete by specializing in either the materials or device-integration layer without directly confronting both leaders simultaneously.
Filings from the most recent 18–24 months are understated due to publication lag and should not be interpreted as a slowdown; the underlying pace of activity is likely higher than current counts suggest. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity is expanding and grounded in semiconductor device and ceramics classes
The annual filing trend shows the field growing on a multi-year basis, with the technology mix dominated by semiconductor device classes and a meaningful secondary layer of ceramics and metallurgy classes that reflect the materials-intensive nature of packaging.
Annual filing trend
Annual filings climbed from 32 records in 2017 to 59 in 2018, then modulated before resuming an upward trajectory through 2024. The 2025 and 2026 figures are substantially understated by publication lag and do not represent a real decline; the 47% recent-window growth figure is the more reliable indicator of pace.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01L (semiconductor devices) dominates the branch mix by a wide margin, as expected for a device-packaging field. The next significant clusters — ceramics and refractories (C04B), power conversion (H02M), alloys (C22C), and printed circuits and assemblies (H05K) — reflect the multi-material substrate and thermal management architecture of SiC modules. Branches such as powder metallurgy (B22F) and metal casting (B22D) appear at lower but non-trivial levels, indicating active work on bonding and heat-spreader materials.
↗ 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.
Contact and die attach metallization for silicon c…
A semiconductor device package includes a package substrate having a die attach region, a silicon carbide (SiC) substrate having a first surface including a semiconductor device layer thereon and a second surface that is opposite the first surface, and a die attach metal stack. The die attach metal stack includes a sputtered die attach material layer that… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Ceramic substrate for a light emitting diode where… | 135 |
| 2 | Ceramic substrate for a light emitting diode where… | 84 |
| 3 | Silicon Carbide on Diamond Substrates and Related … | 84 |
| 4 | Power module semiconductor device | 71 |
| 5 | Semiconductor power module | 67 |
| 6 | Silicon carbide on diamond substrates and related … | 64 |
| 7 | Semiconductor device and its manufacturing method | 59 |
| 8 | Ceramic Substrate for Light Emitting Diode Where t… | 49 |
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
The combination of a growth lifecycle, moderate top-tier concentration, active university-industry collaboration, and. China’s lead in filing jurisdiction shapes the competitive risk and opportunity map for teams entering or expanding in this space.
Growth stage — annual filings still rising
The lifecycle evidence classifies SiC power module packaging as a Growth-stage field, with annual filings still rising and the 47% recent-window expansion confirming that the technology has not yet reached saturation. This implies that foundational patent positions are still being established, and that entering now — particularly in underserved sub-domains — carries less risk of finding all routes blocked than in a mature field.
Growth lifecycleTop five hold 40% of the largest-filer pool
The top five filers — Denka, Wolfspeed, Mitsubishi Materials Corp, Semicon Components Industrial, and Rohm Co Ltd — collectively account for 40% of the combined total among the hundred largest filers. This level of concentration is moderate: enough that any freedom-to-operate analysis must address these leaders’ portfolios, but not so extreme that a focused challenger in ceramics, alloy substrates, or power conversion integration cannot carve out a defensible position.
Moderate concentrationSumitomo–A.L.M.T. and Huazhong partnerships are most active
The most active co-filing pair is Sumitomo Electric Industries and A.L.M.T. Corp, with five joint filings, reflecting a materials-supplier collaboration on composite substrates. Huazhong University of Science and Technology is the most active academic co-filer, pairing with Changzhou Ruihua New Energy Technology on three filings and with Guangdong Power Grid Research Institute on one. Xi’an Jiaotong University co-files with the Shaoxing Wide Bandgap Semiconductor Research Institute on two filings. These partnerships signal that Chinese academic-industrial consortia are becoming a structural feature of the landscape.
Academic-industrial partnershipsChina leads in filings; US and Europe are essential validation markets
China is the leading filing jurisdiction at the patent-record level, followed by the United States and Europe (EPO). Japan and WIPO (PCT) represent the next tier. The breadth of jurisdictions — including India, Germany, and South Korea — indicates that leading applicants are pursuing multi-market protection, and that any competitive analysis of freedom to operate must cover at minimum the US, EP, and CN zones. The dominance of Chinese filings also points to growing domestic SiC supply-chain ambitions.
CN–US–EP triad criticalGo 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 |
|---|---|---|
| Sumitomo Electric Industries Ltd | A.L.M.T. Corp | 5 |
| Huazhong University of Science and Technology | Changzhou Ruihua New Energy Technology Co Ltd | 3 |
| Xi’an Jiaotong University | Shaoxing Wide Bandgap Semiconductor Research Institute | 2 |
| Sumitomo Electric Industries Ltd | Toyota Motor Corporation | 1 |
| Huazhong University of Science and Technology | Guangdong Power Grid Co Ltd Electric Power Research Institute | 1 |
| Huazhong University of Science and Technology | Changzhou Ruihua Power Electronic Devices Co Ltd | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Denka anchors materials; Wolfspeed leads on device integration
The two leading applicants occupy distinct technology positions — one in ceramic substrate materials, the other in SiC device architecture — which means their portfolios are largely complementary rather than directly competing, and that challenging either requires a different technical strategy.
Denka Co Ltd
Denka Co Ltd is the top-ranked filer with 67 patent records, concentrated in H01L 23 (semiconductor device housings and heat dissipation) and two ceramics subclasses (C04B 41 and C04B 35), confirming that its portfolio is anchored in ceramic substrate technology for power module packaging. Its recent-period momentum shows a 64% decline versus the prior three-year window, suggesting that its foundational positions are largely established and that incremental filings are slowing — a sign of portfolio maturation rather than strategic retreat.
patent records: 67Wolfspeed Inc
Wolfspeed Inc ranks second with 63 patent records, with its filings spread across H01L 23, H01L 29 (semiconductor device structures), and H01L 25 (assemblies of multiple semiconductor devices), reflecting a device-architecture and multi-chip module emphasis rather than a pure materials play. Recent momentum shows a 42% decline versus the prior window, also indicating a maturing foundational portfolio. As the leading SiC device maker by volume, Wolfspeed’s packaging patents represent a vertical integration strategy that competitors targeting the device-integration layer must navigate carefully.
patent records: 63| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Denka Co Ltd | 4 | ▼ -64% |
| Wolfspeed Inc | 11 | ▼ -42% |
| Semicon Components Industrial LLC | 10 | ▲ new entrant |
| A.L.M.T. Corp | 2 | ▲ new entrant |
| Xi’an Jiaotong University | 8 | ▲ new entrant |
| Huazhong University of Science and Technology | 4 | ▲ new entrant |
Under-served adjacent branches worth monitoring
Several IPC branches adjacent to the dominant semiconductor device class carry meaningful patent-record counts but remain at relatively low share within the overall corpus, indicating areas where coverage is thinner relative to their technical relevance to SiC module packaging.
H02M · Power conversion integration
H02M (power conversion, AC/DC and related topologies) accounts for 60 patent records — about 5% of the branch distribution — despite being the primary application domain for SiC power modules. The relative sparsity suggests that packaging innovations specifically designed around converter-level electrical and thermal co-optimization (e.g., low-inductance layout for high-frequency switching, integrated gate-driver packaging) are under-patented. An entrant with cross-disciplinary competence in both packaging and power electronics circuit design could establish differentiated positions here.
Search this in Eureka →H05K · Printed circuits and assemblies
H05K (printed circuits and assemblies) represents 51 patent records at roughly 4% share, indicating that substrate interconnect and PCB-level integration aspects of SiC module packaging remain relatively sparse. Given that high-voltage SiC modules increasingly require customized direct-bonded-copper or active-metal-brazed substrates with embedded interconnects, the low coverage in H05K suggests room for differentiated work on substrate-level assembly architecture, especially in combination with the ceramics branch (C04B) where Denka is dominant.
Search this in Eureka →How leading applicants differ by technology route
Route coverage across the main technology branches in the current evidence set.
| Player | H01L 23 · Semiconductor devices | H01L 25 · Semiconductor devices | H01L 21 · Semiconductor devices | H01L 29 · Semiconductor devices | H10W 40 |
|---|---|---|---|---|---|
| Wolfspeed Inc | Strong · 58 | Moderate · 29 | Moderate · 23 | Strong · 40 | Emerging · 3 |
| Semicon Components Industrial LLC | Strong · 28 | Moderate · 7 | Strong · 21 | Moderate · 13 | Strong · 16 |
| Denka Co Ltd | Strong · 67 | Absent | Emerging · 7 | Absent | Emerging · 9 |
| Rohm Co Ltd | Strong · 13 | Strong · 21 | Moderate · 7 | Moderate · 5 | Absent |
| Mitsubishi Materials Corp | Strong · 29 | Absent | Absent | Absent | Absent |
| Huazhong University of Science and Technology | Strong · 12 | Strong · 8 | Absent | Absent | Moderate · 6 |
| Xi’an Jiaotong University | Strong · 11 | Strong · 11 | Absent | Absent | Moderate · 4 |
Frequently asked questions
The evidence set covers 365 patent families in scope. The leading jurisdiction by patent records is China, followed by the United States and Europe (EPO).
Denka Co Ltd ranks first with 67 patent records, concentrated in semiconductor device housing and ceramics subclasses. Wolfspeed Inc is second with 63 patent records, focused on device structure and multi-chip assembly classes.
The lifecycle evidence classifies the field as Growth-stage, with annual filings still rising and a 47% expansion recorded over the recent window. The most recent 18–24 months of data are understated by publication lag, so the true pace is likely higher than current counts indicate.
China leads at the patent-record level, followed by the United States, Europe (EPO), Japan, and WIPO (PCT). Any freedom-to-operate or competitive analysis should prioritize at minimum the CN, US, and EP jurisdictions.
Yes. The most active co-filing pair is Sumitomo Electric Industries and A.L.M.T. Corp with five joint filings. Huazhong University of Science and Technology is the most active academic co-filer, collaborating with Changzhou Ruihua New Energy Technology (three filings) and others. Xi’an Jiaotong University co-files with the Shaoxing Wide Bandgap Semiconductor Research Institute.
H02M (power conversion) at 60 patent records and H05K (printed circuits and assemblies) at 51 patent records are the most notable adjacent branches with relatively thin coverage given their technical relevance to SiC module integration. Ceramics (C04B) at 73 records and alloys (C22C) at 54 records are denser but still well below the H01L core, and are largely controlled by a small number of materials specialists.
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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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