Aluminium Nitride Ceramic Powder and Sintering Patents
41.1% concentration. The five leading assignees account for 1,206 of the 2,931 records in scope — filing here means competing directly against entrenched incumbents, not a fragmented field. Annual filings climbed from 38 in 2017 to a peak of 81 in 2020, then declined; the 2021-to-2024 span shows a 48% drop, from 66 to 34 filings. Figures for 2025 and 2026 are still incomplete because publication lags filing by roughly 18 months, so the most recent bars will fill in further before the trend can be called finished.
- 1DENKA CO LTD9.9%
- 2NAT INST FOR MATERIALS SCI8.3%
- 3TOKUYAMA CORP8.0%
- 4SUMITOMO ELECTRIC INDUSTRIES LTD7.5%
- 5KK TOSHIBA7.5%
See the full aluminium nitride ceramic powder and sintering 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 on AlN ceramic patents
Who holds the most patents in aluminium nitride ceramic powder and sintering?
The dataset ranks 100 assignees, and the leader holds 290 of the 2,931 records in scope, well ahead of the rest of the field. The top five assignees combined hold 1,206 records, or 41.1% of all records, and the top ten reach 56.8%. This is a concentrated field: a small number of established ceramics and electronics manufacturers, rather than a broad base of small filers, account for most of the activity.
Is filing activity in aluminium nitride ceramics growing or slowing down?
Filings rose steadily to a peak of 81 in 2020, then declined to 34 by 2024, a 48% fall from the 66 filings recorded in 2021. That said, publication typically lags actual filing by around 18 months, so the 2025 and 2026 figures in any chart are necessarily incomplete and will revise upward. The honest reading is that the field has cooled from its 2020 peak through 2024, not that it is currently inactive.
What does the IPC classification breakdown say about where AlN innovation is happening?
C04B (ceramics, cement and refractories) appears on 56.4% of the 2,931 records, and H01L (semiconductor devices) on 29.6%, with C01B and C09K also carrying meaningful shares. Because records often carry multiple IPC codes, these figures do not sum to 100% and should not be read as a simple ranking. The practical takeaway is that a large share of filings sit at the intersection of ceramics processing and device integration, meaning substrate qualification and packaging claims matter as much as raw material chemistry.
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 Aluminium Nitride Ceramic Powder and Sintering 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.