Gallium Oxide and Ultrawide Bandgap Substrate Patents
53.7% of all 82 records in scope sit with just five assignees, and 86.6% sit with ten — a field with a narrow, defensible core rather than a wide-open one. Activity climbed to a peak of 16 filings in 2018, then eased. The 2021-to-2024 span — the last years with a complete publication picture — shows a decline from 12 to 5 filings, a -58% move. 2025 and 2026 are still filling in and should not be read as a continuation of that decline.
- 1MITSUBISHI ELECTRIC CORP15
- 2POWER CUBESEMI INC9
- 3MITSUBOSHI DIAMOND IND CO LTD8
- 4LG INNOTEK CO LTD6
- 5TDK CORP6
See the full gallium oxide and ultrawide bandgap 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 on gallium oxide substrate patents
Who holds the most patents on gallium oxide substrates?
The ranking returned for this dataset covers 24 companies, and the leader holds 15 of the 82 records in scope — more than double the fifth-place total of 6. That gap indicates a genuine leadership position rather than a crowded field of near-equal filers. The top five assignees combined hold 53.7% of all 82 records, and the top ten hold 86.6%, so most of the activity sits with a fairly small group even though 24 companies appear overall.
Is gallium oxide substrate patent activity growing or slowing?
Filings peaked in 2018 at 16 in a year, and across the last three complete years — 2021 to 2024 — activity fell from 12 to 5 filings, a -58% move. Because publication typically lags actual filing by around 18 months, the 2025 and 2026 figures in this dataset are still incomplete and should not be read as confirming a continued decline. A more reliable read will only be possible once those years finish publishing.
What patent classes matter most for gallium oxide substrate technology?
H01L (semiconductor devices) is by far the dominant class, appearing on 81.7% of the 82 records in scope, followed by H10P at 36.6% and both H10D and C30B (crystal growth) at 26.8%. Smaller classes covering welding/brazing, stone-working, coating and dimensional measurement each touch under 10% of records. Because a single filing can carry multiple IPC classes, these shares add up to more than 100% and should be read individually against the 82-record total, not summed.
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 Gallium Oxide and Ultrawide Bandgap 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.