GaN LED Reliability & Lumen Maintenance Patent Snapshot
The GaN LED reliability and lumen maintenance patent space is a mature, concentrated field dominated by a small number of established semiconductor and lighting companies, with Wolfspeed and Cree LED holding the top two positions. Annual filing volume has plateaued near its 2017 peak, signaling a field that has largely moved past rapid expansion into consolidation and incremental improvement.
Wolfspeed and Cree LED lead a concentrated field
Wolfspeed holds the leading position among the top hundred filers, followed closely by Cree LED in second place. Samsung Electronics ranks third, with a cluster of individual inventors and smaller entities filling out the mid-tier.
The top five filers together account for 37% of the combined total among the ranked applicants visible in this query, indicating moderate-to-high concentration at the top while a long tail of smaller participants dilutes the field further down the ranking.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Wolfspeed Inc | 25 | |
| 2 | Cree LED Inc | 21 | |
| 3 | Samsung Electronics Co Ltd | 7 | |
| 4 | EDMOND JOHN ADAM | 6 | |
| 5 | KO HYUN CHUL | 5 | |
| 6 | CHO BYUNG IL | 5 | |
| 7 | WaveSquare | 5 | |
| 8 | JANG PIL GUK | 5 | |
| 9 | CHO MEOUNG WHAN | 5 | |
| 10 | BERGMANN MICHAEL JOHN | 4 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Lumileds Holding BV | 4 | |
| 12 | DOVERSPIKE KATHLEEN MARIE | 4 | |
| 13 | GE Lighting Solutions LLC | 4 | |
| 14 | KONG HUA SHUANG | 4 | |
| 15 | GWANGJU INST OF SCI & TECH | 3 | |
| 16 | Sumitomo Electric Industries Ltd | 3 | |
| 17 | Koninklijke Philips NV | 3 | |
| 18 | Philips Lumileds Lighting Company LLC | 3 | |
| 19 | ShineOn Beijing Technology | 2 | |
| 20 | Podium Photonics Guangzhou | 2 |
The leadership positions of Wolfspeed and Cree LED reflect decades of foundational GaN device development; their depth in H01L semiconductor device patents creates a significant prior-art barrier for new entrants pursuing core reliability mechanisms.
The most recent filing periods are subject to publication lag and should be interpreted cautiously; apparent stagnation in the latest years does not necessarily indicate a halt in inventive activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
How activity and technology mix are shifting in GaN LED reliability
The annual filing trend and technology-branch composition together characterize a field that peaked around 2017 and is now dominated overwhelmingly by semiconductor device patents, with a secondary cluster in laser and stimulated-emission work.
Annual filing trend
Filing volume peaked in 2017 and has since declined sharply, reaching near-zero annual counts from 2020 onward. The most recent years remain subject to publication lag and cannot be read as a confirmed permanent halt in activity.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01L semiconductor devices is the visible branch by a wide margin, reflecting the core device-physics focus of reliability and lumen maintenance research. H01S lasers and stimulated emission forms a meaningful secondary cluster, while nanotechnology, organic semiconductors, and surface-deposition branches each account for only a handful of records.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Method for producing gallium nitride light emittin…
The present invention relates to a method for improving the performance of P-type ohmic contact of gallium nitride LED wafer. Magneto sputtering is used to spray nickel material in nano particles onto the surface of gallium nitride epitaxial layer. The thickness of nickel is between 1 nm to 100 nm. Following that, at least one layer of high work function… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | GaN LED with solderable backside metal | 180 |
| 2 | Hybrid organic-inorganic semiconductor light emitt… | 178 |
| 3 | LED with Particles in Encapsulant for Increased Li… | 176 |
| 4 | Group III nitride LED with undoped cladding layer … | 162 |
| 5 | High efficiency group III nitride LED with lenticu… | 136 |
| 6 | Gallium nitride-type semiconductor device | 131 |
| 7 | GaN LED with solderable backside metal | 122 |
| 8 | Increased light extraction from a nitride LED | 106 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Wolfspeed
Wolfspeed ranks first with 25 patent records among the top hundred filers. Its technology focus spans H01L semiconductor devices as the primary branch, a substantial secondary position in H01S lasers and stimulated emission, and a small presence in B82Y nanotechnology applications — giving it the broadest branch coverage of any single player in this corpus. No momentum data is available for trajectory assessment.
patent records: 25Cree LED
Cree LED ranks second with 21 patent records among the top hundred filers, concentrated entirely in the H01L semiconductor devices branch alongside H01L21 process-related classifications. Its portfolio is narrower in branch scope than Wolfspeed’s but remains the closest rival in absolute record count. No momentum data is available for trajectory assessment.
patent records: 21Frequently asked questions
There are 8 patent families in scope for this analysis. The corpus is intentionally focused on the intersection of GaN LED technology with reliability and lumen maintenance subject matter.
Wolfspeed holds the top-ranked position among the ranked applicants visible in this query with 25 patent records, followed by Cree LED with 21 patent records and Samsung Electronics with 7.
The United States is the lead filing jurisdiction, followed by Europe via the EPO, China, and WIPO PCT. South Korea also appears, consistent with Samsung Electronics’ presence in the applicant ranking.
The field is classified as Maturity. Annual filings plateaued near their 2017 peak and have not meaningfully recovered since, indicating the foundational patent landscape is largely established.
C23C coating and surface deposition and B82Y nanotechnology applications each show very low patent record counts within this corpus — one and four records respectively — making them the sparsest branches adjacent to the visible H01L semiconductor device class.
Yes. The most active co-filing pair is EDMOND JOHN ADAM and Wolfspeed with six joint records. Wolfspeed also co-files with KONG HUA SHUANG and DOVERSPIKE KATHLEEN MARIE (four records each). On the Philips side, Philips Lumileds Lighting Company and Koninklijke Philips share five co-filed records, reflecting internal corporate-family coordination.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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