Active Metal Brazed Silicon Nitride Substrate Patents: Leaders & Trends 2026
Active Metal Brazed Silicon Nitride Substrate Patents: Who Leads and Where the Field Is Open
34.9% of all 3,527 records sit with five assignees, yet the ranked leaders run 100 deep, so a long tail of single- and few-filing entrants still holds real claim territory. Annual filings rose from 161 in 2017 to a peak of 316 in 2023, then held near that level through 2024 (241, down 3% from 249 in 2021). The 2025 and 2026 figures will continue to rise as publications catch up to filing dates, given the roughly 18-month publication lag.
- 1FUJI ELECTRIC CO LTD10.6%
- 2NITERRA MATERIALS CO LTD6.6%
- 3DENKA CO LTD6.6%
- 4KK TOSHIBA5.8%
- 5INFINEON TECHNOLOGIES AG5.3%
See the full active metal brazed silicon nitride substrates 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
What counts as an active metal brazed silicon nitride substrate in this patent landscape?
It refers to a silicon nitride ceramic substrate joined to a metal layer, typically copper or aluminium, using a titanium-bearing active metal braze filler rather than a direct-bond or thick-film process. This landscape captures 3,527 published records that combine active metal brazing or AMB substrate language with technical claims covering titanium interlayers, fracture toughness, thermal conductivity, braze filler composition, residual stress or power-module reliability. The combination matters because AMB substrates are used specifically where a ceramic needs both the thermal conductivity of silicon nitride and the joint reliability that active metal brazing provides under thermal cycling.
Who are the leading patent holders in active metal brazed silicon nitride substrates?
The ranking covers 100 assignees, with the leader holding 373 records against 188 for the fifth-placed assignee and 60 for the tenth, showing a steep concentration at the very top of the field. The five leading assignees together hold 34.9% of all 3,527 records in scope, and the top ten hold 49.4%. That leaves roughly half the field distributed across a long tail of smaller filers, so leadership at the top does not mean the space is closed to new entrants.
Is filing activity in this field still growing?
Filing peaked at 316 records in 2023 and eased to 241 by 2024, a -3% change from the 249 records filed in 2021 — best read as a plateau rather than a decline. Publication typically lags actual filing by around 18 months, so the lower counts visible in 2025 and 2026 in the raw data reflect incomplete publication, not a real drop in filing. Any conclusion about the field slowing down should rely on 2024 or earlier, the last year that can be treated as substantially complete.
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 Active Metal Brazed Silicon Nitride Substrates 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.