Silicon Carbide Boule Growth Patents: Who Leads and Where Filings Are Headed
40.0% concentration. The top 5 assignees hold 586 of 1,464 records in scope — filing here is already concentrated at the top, not wide open. Filings rose from 30 in 2017 to a peak of 126 in 2020, then declined; the 2021-to-2024 window alone shows a -60% drop, from 124 to 50 filings. Given the 18-month publication lag, 2025 and 2026 figures are still incomplete and should not yet be read as a continuation of that decline.
- 1WOLFSPEED INC217
- 2SUMITOMO ELECTRIC INDUSTRIES LTD125
- 3RESONAC CORP98
- 4KWANSEI GAKUIN EDUCTIONAL FOUND76
- 5TOYOTA TSUSHO CORP70
See the full silicon carbide boule growth 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 silicon carbide boule growth?
One assignee leads the ranked field with 217 records, well ahead of the fifth-ranked company at 70. The top five assignees combined hold 586 of the 1,464 records in scope, or 40.0% of the field, showing that filing activity is concentrated rather than evenly spread. Beyond the top ten, which together hold 54.1% of records, coverage drops off quickly across the remaining ranked companies.
Is patent filing in SiC boule growth still growing?
Filing peaked in 2020 at 126 records and then declined, falling from 124 in 2021 to 50 in 2024, a -60% drop over that span. That decline covers only complete years; 2025 and 2026 figures will rise as pending applications publish, given the roughly 18-month lag between filing and publication. Based on complete-year data, the field has cooled from its 2020 high rather than continuing to accelerate.
What does micropipe density have to do with boule growth patents?
Micropipe density is one of the defect metrics used throughout the search terms defining this dataset, alongside basal plane dislocation and polytype control, because it directly affects wafer yield from a grown boule. Patents addressing growth conditions, seed preparation and diameter expansion frequently claim defect-density outcomes as evidence the method works. It functions less as its own filing category and more as a performance claim attached to growth-process patents.
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 Silicon Carbide Boule Growth 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.