Epitaxy for Power Device Structures Patents: Leaders & Trends 2026
Epitaxy for power device structures: patents, leading filers and where claim space is still open
Filing peaked in 2019 at 17 records and has since eased, with 2021's 16 filings falling to 11 by 2024 — a 31% decline over that span, the last window publication lag lets us read cleanly. Filings rose through the late 2010s to a peak of 17 records in 2019, then eased; the last complete year, 2024, sat at 11 records against 16 in 2021 — a 31% decline over that three-year span. Treat 2025 and 2026 figures as still filling in rather than as evidence of a further drop.
- 1THE BOARD OF TRUSTEES OF THE UNIV OF ILLINOIS47
- 2WOLFSPEED INC40
- 3RGT UNIV OF CALIFORNIA33
- 4APPLIED MATERIALS INC17
- 5UNIVERSITY OF SOUTH CAROLINA15
See the full epitaxy for power device structures analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about this landscape
Who holds the most patents in epitaxy for power device structures?
One assignee leads the ranking with 47 records, well clear of the fifth-ranked assignee at 15 and the tenth-ranked at 11. That gap indicates a genuine leader rather than a cluster of near-equal filers at the top. Beyond the top 10, which together hold 59.9% of the 359 records in scope, filing spreads across a long tail of universities, device makers and smaller entrants, so the field is concentrated but not closed to new filers.
Is patent filing in this area growing or slowing down?
Filings peaked in 2019 at 17 records and have since eased, with the last complete year, 2024, at 11 records against 16 in 2021 — a 31% decline over that span. However, publication typically lags filing by around 18 months, so the 2025 and 2026 figures in any dataset are understated by nature and should not be read as continued decline. The honest read is a cooling from a 2019 peak, not a collapsing field.
What technology areas are most heavily claimed within this space?
H01L, covering general semiconductor device structures, appears in 76.3% of the 359 records in scope, making it by far the densest class. C30B, crystal growth, follows at 31.8%, and H10D general semiconductor devices at 16.7%. Smaller classes such as G01N testing, B81C MEMS manufacturing, H10K organic semiconductors and C23C coating deposition each sit under 10%, marking them as comparatively lighter claim territory relative to core device-structure filings.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Epitaxy for Power Device Structures covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.