GaN Substrate Patents: Top Companies & Filing Trends 2026
- 36.6% concentration. The five leading assignees account for 794 of 2,169 records in scope — a field with a defined top tier rather than a diffuse crowd.
- Filings cooled after 2021. Annual filings fell from 95 in 2021 to 47 in 2024, a 51% drop over that span, though 2025-26 counts are still filling in as publication catches up.
- H01L dominates, C30B is the real differentiator. 79.8% of records touch semiconductor-device claims (H01L), but only 38.4% reach into crystal-growth claims (C30B) — the growth-process layer is thinner than the device layer.
Filing growth compares 2021 (95 records) with 2024 (47) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 2,169 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This review covers 2,169 published records matching gallium nitride substrate and template technology — free-standing GaN, HVPE growth, ammonothermal growth, threading dislocation density control, substrate bow and crack formation, and off-cut angle engineering — filed or published between 2015 and mid-2026. Records are drawn from title, abstract and claim text matching, then grouped into patent families for the assignee ranking so that multi-jurisdiction filing and continuations do not inflate any single applicant’s count.
The technology sits at the intersection of bulk crystal growth and device fabrication: a record can claim a growth process, a substrate property, and a device structure built on top of it simultaneously, which is why the IPC shares below sum to well over 100% of the record total.
Filing trend and technology composition
Two views of the same 2,169-record set: activity over time, and where claims sit across the IPC scheme. Both use the full record set as the denominator.
Filing activity peaked in 2020, then eased
Annual filings rose to a peak of 106 in 2020, then declined; the 2021-to-2024 span shows a 51% drop, from 95 to 47 filings a year. Counts for 2025 and 2026 are still incomplete because publication typically lags filing by around 18 months — treat the tail of the chart as a floor, not a forecast.
Claims cluster in device structure, thin out in growth chemistry
H01L (semiconductor devices) appears in 79.8% of the 2,169 records, and C30B (crystal growth) in 38.4% — the largest gap in the composition. H10P and H10D each cover roughly a fifth to a quarter of records, while coating/deposition (C23C) and inorganic chemistry (C01B) are present in single-digit-to-low-double-digit shares, marking them as narrower, more specialised claim territory.
Shares are the percentage of the 2,169 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Gallium Nitride Substrate and Template with Eureka
This page is one run against one query. Ask Eureka your own question about gallium nitride substrate and template and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited prior art
US10497562B1 — Method for manufacturing gallium nitride substrate using hydride vapor phase epitaxy
Discloses a method of fabricating a gallium nitride substrate using HVPE, including a first ammonia surface treatment of a sapphire substrate, formation of a buffer layer via ammonia and hydrogen chloride gas, a second ammonia surface treatment, and GaN growth while stepwise lowering the ammonia-to-hydrogen-chloride flow ratio.Filed by Industry-University Cooperation Foundation Hanyang University, published 2019-12-03.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20110308453A1 | Closed loop mocvd deposition control | 602 |
| 2 | US20110253044A1 | Showerhead assembly with metrology port purge | 575 |
| 3 | US20110140172A1 | Reverse side engineered iii-nitride devices | 546 |
| 4 | US6967353B2 | Semiconductor light emitting device and fabrication method thereof | 487 |
| 5 | WO2009099776A1 | Closed loop mocvd deposition control | 486 |
| 6 | US20060255341A1 | Bonded intermediate substrate and method of making same | 470 |
| 7 | US7732301B1 | Bonded intermediate substrate and method of making same | 406 |
| 8 | US20100025656A1 | White light devices using non-polar or semipolar gallium containing materials and phosphors | 356 |
| 9 | US20090081857A1 | Non-polar and semi-polar GaN substrates, devices, and methods for making them | 356 |
| 10 | US6617060B2 | Gallium nitride materials and methods | 355 |
Citation counts are drawn from within this searched corpus and skew toward older filings; use them as a signal of influence on subsequent filers, not of present-day commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three read-outs from the assignee and technology data that bear directly on where to file next and where prior art risk is heaviest.
A defined top tier, not a diffuse field
The five leading assignees hold 794 of 2,169 records (36.6%), and the ten leading assignees hold 1,113 (51.3%). That is enough concentration that a new entrant's freedom-to-operate review should start with the leaders' portfolios specifically, not a generic keyword sweep.
Activity has eased from its 2020 peak
Filings peaked at 106 in 2020 and fell to 47 by 2024, a 51% decline over the 2021-2024 window. Several of the most active historical filers show zero filings in the latest tracked year, though that reading should be treated cautiously given publication lag.
Device claims outnumber growth-process claims
Nearly four in five records touch H01L device-structure claims, while just over a third reach into C30B crystal-growth claims. Applicants building novel growth chemistry — rather than device architecture on top of commodity substrates — face comparatively less crowded claim space.
Joint filing is limited and concentrated
Only ten co-assignee pairings appear in this dataset, and the strongest pairing recurs far more often than the others — a sign that most applicants in this space file independently, with a small number of tight, repeat collaborations rather than a broad partnership network.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to gallium nitride substrate and template, with the prior art for and against each one.
Who holds the ground, and where the gate sits
The ranked leaders combine university research groups, vertically integrated substrate makers and device manufacturers who backward-integrate into substrate growth. Momentum data suggests the most active historical filers have slowed at the same time overall filings eased.
A single applicant well ahead of the field
The top-ranked assignee holds 249 records against a fifth-place count of 116 and a tenth-place count of 48 — a steep drop-off that marks this as a leader-and-field structure rather than an even spread.
Historical leaders show reduced recent activity
A number of the more active historical assignees register zero filings in the most recent tracked year, including one with a -100% year-on-year change. This should be read against the 18-month publication lag rather than taken as a definitive exit signal.
One collaboration stands well above the rest
The strongest co-assignee pairing in this dataset appears far more often than any other pairing, well ahead of the next-strongest pairs — a signal of a specific, sustained joint research programme rather than incidental co-filing.
| Assignee | Recent year | YoY |
|---|---|---|
| Mitsubishi Chemical Corporation | 1 | — |
| The Regents of the University of California | 0 | -100% |
| SixPoint Materials Inc. | 0 | — |
| Soraa Inc. | 0 | — |
| Sumitomo Electric Industries, Ltd. | 0 | — |
| Seoul Semiconductor Co., Ltd. | 0 | — |
| Nitronex Corporation | 0 | — |
| SLT Technologies, Inc. | 0 | -100% |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, portfolio strategy, or identifying open claim space.
Run a freedom-to-operate check against the leading assignees
With 36.6% of records held by five assignees, a targeted FTO review of their substrate and growth-process claims will surface more risk than a broad keyword search across the full 2,169 records.
Explore assignee portfolios in EurekaTest claim drafts against the under-claimed branches
Off-cut angle control, substrate bow correction and ammonothermal seed chemistry show lower filing density than device-structure claims — worth a novelty check before committing R&D budget.
Search white space in EurekaTrack the momentum shift as 2025-26 data fills in
Several historically active filers show zero recent-year activity; revisit this trend once publication lag closes to confirm whether it reflects a genuine slowdown or a reporting gap.
Set up a monitoring alert in EurekaCommon questions on GaN substrate patents
The assignee ranking for this dataset is topped by a single applicant holding 249 of 2,169 records, with a steep drop to 116 records at fifth place and 48 at tenth place. The five leading assignees together hold 36.6% of all records in scope, and the ten leading assignees hold 51.3%. This is a leader-and-long-tail structure: a handful of applicants set the claim boundaries that most others have to work around, and the remaining filers are spread thinly across the rest of the ranking.
Filing activity peaked at 106 records in 2020 and has since declined, with complete-year data showing a drop from 95 filings in 2021 to 47 in 2024 — a 51% fall over that span. However, records published in 2025 and 2026 are still incomplete because publication typically lags filing by roughly 18 months, so the most recent years understate real activity. The honest read is that the field cooled from its 2020 peak through 2024; whether it has continued to cool since then is not yet visible in this data.
Both appear as growth-route keywords within this dataset's search scope, and both fall largely under the C30B crystal-growth IPC subclass, which covers 38.4% of the 2,169 records — notably less than the 79.8% covered by H01L device-structure claims. That gap suggests growth-process claims, including ammonothermal seed chemistry and HVPE flow-ratio control such as the technique in US10497562B1, are less densely claimed than the device architectures built on top of the resulting substrates. Anyone comparing the two routes for freedom-to-operate purposes should check growth-process claims specifically rather than relying on device-level searches.
US10497562B1 claims a specific HVPE sequence for growing gallium nitride on a sapphire substrate: a first ammonia surface treatment, formation of an ammonia-and-hydrogen-chloride buffer layer, a second ammonia surface treatment, and GaN growth while stepwise lowering the ammonia-to-HCl flow ratio. It is narrow to that sequence of steps and gas-ratio profile rather than to HVPE growth in general, so alternative buffer-layer chemistries, different substrate-treatment orders, or non-stepwise flow control are plausible ways to design around it. A full clearance opinion would need to check the claim's exact dependent limitations against any planned process, which is outside what this landscape summary can confirm.
The technology composition data shows device-structure claims (H01L, 79.8% of records) far outweighing crystal-growth claims (C30B, 38.4%), and narrower categories like coating and surface deposition (C23C, 7.0%) and inorganic chemistry (C01B, 3.0%) sit well below both. That points to growth-process refinements — off-cut angle optimisation, substrate bow correction, ammonothermal seed chemistry, and dislocation-reduction nucleation patterning — as comparatively under-claimed relative to device architecture built on finished substrates. These are the branches worth a novelty search before drafting new claims.
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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.