GaN HEMT Advanced Materials Patents: Leaders & White Space 2026
- Filing has cooled since the 2018 peak of 16. activity has drifted down toward single digits per year through 2022-2026, suggesting the core claim space is largely staked out rather than still opening up.
- H01L and H10D dominate the IPC mix. 115 and 57 of 126 records respectively sit there, while laser (H01S, 15) and light-emitting (H10H, 4) crossover filings stay thin — a sign device-integration claims remain comparatively open.
- The US receiving office carries 79 of the filings. far ahead of WIPO (14), EPO (12) and China (4), so competitive clearance work for this technology is disproportionately a US prior-art exercise.
What this landscape covers
This review covers patent families indexed under the combined search of gallium nitride HEMT, GaN transistor and related device terms cross-referenced against GaN epitaxial material, AlGaN barrier material and GaN-on-Si substrate claims. The 126 families span 2015 through the middle of 2026, capturing both the device architecture side (enhancement-mode structures, field plates, gate stacks) and the materials side (epitaxial buffer layers, barrier composition, substrate transition layers) that together define commercial GaN HEMT viability.
Because publication typically lags filing by around eighteen months, the 2025-2026 figures in any trend chart understate true recent activity; treat the last one to two years as a floor, not a ceiling.
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Filing trend and technology composition
Annual filings and IPC subclass distribution across the 126 families in this corpus.
Filings rose to a 2018 peak, then eased back
From 7 filings in 2017, activity climbed to a peak of 16 in 2018 before settling near the 2022 midpoint of 5 per year and declining further into 2025-2026 — consistent with a technology whose core structural claims are largely occupied, even as materials-level refinement continues underneath the device layer.
H01L and H10D anchor the classification, laser and LED crossover stays thin
H01L (115 records) and H10D (57) confirm this is overwhelmingly a semiconductor-device corpus; H10W (27) and H10P (10) pick up device-integration variants. G01N (8) and B23K (4) mark materials-characterisation and thermal-bonding niches that see only occasional filings, while H01S (15) and H10H (4) show limited but real crossover into laser and LED structures built on the same epitaxial stack.
Shares are the percentage of the 126 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Gallium Nitride HEMT Advanced Materials with Eureka
This page is one run against one query. Ask Eureka your own question about gallium nitride hemt advanced materials and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
US20100258843A1 — Enhancement Mode GaN HEMT Device and Method for Fabricating the Same
An enhancement-mode GaN transistor and a method of forming it. The enhancement-mode GaN transistor includes a substrate, transition layers, a buffer layer comprised of a III Nitride material, a barrier layer comprised of a III Nitride material, drain and source contacts, a gate III-V compound containing acceptor type dopant elements, and a gate metal, where the gate III-V compound and the gate metal are formed with a single photo mask process to be self-aligned and the bottom of the gate metal and the top of the gate compound have the same dimension.Filed by Efficient Power Conversion Corporation; dated 2010-10-14. Its self-aligned gate-compound-and-metal process is a recurring reference point for later enhancement-mode GaN filings in this corpus.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US9653642B1 | Manufacturable RGB display based on thin film gallium and nitrogen containing light emitting diodes | 168 |
| 2 | US20100327322A1 | Transistor with Enhanced Channel Charge Inducing Material Layer and Threshold Voltage Control | 141 |
| 3 | US9666677B1 | Manufacturable thin film gallium and nitrogen containing devices | 137 |
| 4 | US10002928B1 | Manufacturable RGB display based on thin film gallium and nitrogen containing light emitting diodes | 119 |
| 5 | US20140110722A1 | Semiconductor Structure or Device Integrated with Diamond | 113 |
| 6 | US20100289067A1 | High Voltage III-Nitride Semiconductor Devices | 91 |
| 7 | US20100258843A1 | ENHANCEMENT MODE GaN HEMT DEVICE AND METHOD FOR FABRICATING THE SAME | 85 |
| 8 | US20160380090A1 | GaN SEMICONDUCTOR DEVICE STRUCTURE AND METHOD OF FABRICATION BY SUBSTRATE REPLACEMENT | 76 |
| 9 | WO2010132587A2 | High voltage iii-nitride semiconductor devices | 73 |
| 10 | US20170256638A1 | GaN-on-Si SEMICONDUCTOR DEVICE STRUCTURES FOR HIGH CURRENT/ HIGH VOLTAGE LATERAL GaN TRANSISTORS AND METHODS … | 65 |
Citation counts favour older filings simply because they have had longer to accumulate references within the searched corpus; read them as a measure of influence on subsequent filings, not as a ranking of current commercial relevance.
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Four patterns worth acting on before drafting new claims or scoping a freedom-to-operate review in this space.
Growth has flattened, not accelerated
The 2018 peak of 16 filings has not been matched since; by the 2022 midpoint annual filings had dropped to 5, and the trend continues downward into 2025-2026 (with the caveat that the most recent years are still filling in). This points to a maturing structural-device claim space rather than an expanding one.
Clearance work is disproportionately a US exercise
United States filings (79) dwarf WIPO PCT (14), EPO (12), UK (6), China (4) and Germany (3). Teams doing freedom-to-operate work on GaN HEMT materials should treat US prior art as the primary risk pool, with PCT filings as the secondary check for global exposure.
Device claims dominate; materials-characterisation claims are sparse
G01N (material analysis and testing, 8 records) and B23K (welding, soldering and brazing, 4 records) are thin relative to H01L (115) and H10D (57). That gap suggests characterisation and bonding-process claims tied to GaN epitaxial stacks are comparatively under-filed.
Collaboration is narrow and inventor-anchored
Only 10 co-assignee pairs appear across the corpus, with the strongest pairing (Kub Francis J and Hobart Karl D, 9 shared filings) and two others tied at 8. This is a field of largely independent filers rather than dense joint-venture patenting.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to gallium nitride hemt advanced materials, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| KUB FRANCIS J | HOBART KARL D | 9 |
| NAKATA ALANA | LIDOW ALEXANDER | 8 |
| NAKATA ALANA | CAO JIANJUN | 8 |
| NAKATA ALANA | BEACH ROBERT | 8 |
| LIDOW ALEXANDER | CAO JIANJUN | 8 |
| LIDOW ALEXANDER | BEACH ROBERT | 8 |
| KUB FRANCIS J | MASTRO MICHAEL A | 7 |
| KUB FRANCIS J | ANDERSON TRAVIS | 7 |
Kub Francis J and Hobart Karl D lead with 9 shared filings; Nakata Alana appears in two of the next-strongest pairs, with Lidow Alexander and with Cao Jianjun, each at 8 — indicating a small number of long-running inventor collaborations rather than broad cross-assignee alliances.
Who holds the claim space
Filing activity concentrates among a handful of named assignees, several of whom show no new filings in the latest tracked year — a sign of either a settled portfolio or a shift in filing strategy elsewhere.
Kyocera SLD Laser is the only named assignee still filing in the latest tracked year
Against a field where most other tracked assignees — Efficient Power Conversion, Mitsubishi Electric, Ulm University, GaN Systems and inventor Kub Francis J — show zero filings in the latest year, Kyocera SLD Laser's single filing stands out as the one visible sign of continued activity at the corpus's edge.
The densest inventor pairing sits on device-structure claims
Kub Francis J and Hobart Karl D's 9 co-filings make them the tightest collaboration in the dataset, concentrated in the device-architecture side of the corpus rather than the materials-characterisation side.
Efficient Power Conversion's foundational filing still anchors the field
Efficient Power Conversion Corporation's enhancement-mode GaN HEMT filing (US20100258843A1) remains a widely referenced structural baseline even though the assignee shows no new filings in the latest tracked year — its earlier claims continue to shape how later entrants draft around gate and barrier structures.
| Assignee | Recent year | YoY |
|---|---|---|
| Kyocera SLD Laser, Inc. | 1 | 0% |
| Efficient Power Conversion Corporation | 0 | — |
| Mitsubishi Electric Corporation | 0 | — |
| Ulm University | 0 | — |
| GaN Systems Inc. | 0 | — |
| KUB FRANCIS J | 0 | — |
| HOBART KARL D | 0 | — |
| Raytheon Company | 0 | — |
Where to take this
The dataset points to specific next steps depending on whether the goal is clearance, drafting or portfolio strategy.
Run a targeted FTO check on US filings
With 79 of the tracked filings routed through the US receiving office, a freedom-to-operate review for any new GaN HEMT materials work should start there before extending to PCT or EPO coverage.
Explore US prior art in EurekaProbe the characterisation and bonding gaps
G01N and B23K subclasses show only 8 and 4 records respectively against 115 in H01L, suggesting materials-characterisation and thermal-bonding claims tied to GaN epitaxial stacks are comparatively open for new filings.
Map the white space in EurekaTrack whether flattening filings reflect consolidation or a lull
Filings dropped from a 2018 peak of 16 toward roughly 5 by 2022; confirming whether this reflects claim-space saturation or a temporary pause requires watching the next one to two publication cycles as 2025-2026 data fills in.
Set up monitoring in EurekaCommon questions on GaN HEMT advanced materials patents
The corpus shows activity concentrated among a small set of named assignees rather than one dominant leader, with Efficient Power Conversion Corporation's early enhancement-mode GaN HEMT filing (US20100258843A1) still frequently cited as a structural baseline. Kyocera SLD Laser is the only named assignee showing a filing in the most recent tracked year, while others such as Mitsubishi Electric, Ulm University and GaN Systems show no activity in that same window. Because publication lags filing by roughly 18 months, the most recent year understates true activity for all of these players, so current standing should be checked against fresher data before drawing firm conclusions.
No, not on this evidence. Filings rose from 7 in 2017 to a peak of 16 in 2018, then eased back to around 5 by the 2022 midpoint and continued declining into 2025-2026. That pattern is more consistent with a maturing, already-claimed structural-device space than with an expanding one, though materials-level refinement claims may still be filed beneath that ceiling.
The IPC distribution points to several under-filed branches relative to the dominant H01L and H10D device classes: AlGaN barrier composition tuning, GaN-on-Si transition-layer characterisation, and the thermal-bonding and buffer-layer-defect analysis overlaps with B23K and G01N respectively. These are areas where claim density is thin against the core device architecture claims, meaning first movers there face less crowded prior art. That said, thin filing density is not proof the technology is easy to reduce to practice — it may simply be under-explored.
US20100258843A1, filed by Efficient Power Conversion Corporation, claims an enhancement-mode GaN transistor built with a substrate, transition layers, a III-Nitride buffer layer, a III-Nitride barrier layer, and a self-aligned gate stack formed by a single photomask process where the gate compound and gate metal share the same bottom-to-top dimension. Any new design using that specific self-aligned single-mask gate formation technique on a comparable substrate-buffer-barrier stack should be checked against this filing's claim scope. It does not block all enhancement-mode GaN HEMT work broadly — only implementations that match its specific gate-formation and dimensional-matching limitations — so a claim-by-claim comparison against your actual gate process is the right next step rather than assuming blanket coverage.
The United States accounts for 79 of the tracked filings, far ahead of WIPO PCT (14), the European Patent Office (12), the UK (6), China (4) and Germany (3). This means a clearance search focused only on European or Chinese filings would miss the majority of the relevant prior art in this field; the US should be the first jurisdiction searched, with PCT filings reviewed next for broader international exposure.
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.