Micro-LED Fabrication Patents: Who Leads, Where Gaps Remain 2026
- Filing has already peaked. Applications rose to 217 in 2023 and the run rate since has flattened rather than continued climbing — this is a maturing claim space, not an emerging one.
- China and the US split the filing base almost evenly. 522 China filings versus 483 US filings means neither jurisdiction alone defines freedom to operate; a clearance search limited to one country misses the other half of the art.
- Momentum has stalled across every major assignee at once. The largest filers — from Apple to BOE to LuxVue — each show zero filings in the latest tracked year, a pattern consistent with the 18-month publication lag rather than an actual pause in R&D.
What this landscape covers
Micro-LED fabrication and transfer patents cover the manufacturing steps that turn micron-scale LED die into a working display: epitaxial uniformity, sidewall passivation, mass transfer and bonding, plus the defect-repair steps needed to make a panel yield economically. This dataset pulls 1,422 patent families filed between 2015 and mid-2026 that combine those process terms with core semiconductor-device classifications, giving a working map of who has staked claims on the transfer and bonding steps that remain the industry’s yield bottleneck.
The filing curve peaked in 2023 and has since flattened, while the receiving-office split between China and the United States shows the contest is being fought in parallel patent systems rather than concentrated in one. Publication lag means the final two years of data will fill in further as pending applications publish, but the shape of the last decade is already clear.
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Filing trends and technology composition
Family counts, filing years and IPC composition below are drawn directly from the 1,422-family dataset; use them to gauge where claim density is heaviest and where the classification footprint is thinnest.
A decade of growth followed by a plateau
Annual filings climbed from 74 in 2017 to a peak of 217 in 2023. The 2022 midpoint of 196 sitting so close to the peak indicates the growth phase had already slowed before 2023, and the flat-to-declining trend since is not simply an artefact of publication lag on its own.
Concentration inside semiconductor device classes
Every record in this set carries an H01L semiconductor-device classification, with secondary weight in H10P and display-specific classes (G09F, G09G). Optical-element filings under G02B and organic-semiconductor filings under H10K are comparatively thin, suggesting the patent activity is concentrated on the LED die and transfer process itself rather than on downstream optics or hybrid OLED integration.
Shares are the percentage of the 1,422 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Micro-LED Fabrication and Transfer with Eureka
This page is one run against one query. Ask Eureka your own question about micro-led fabrication and transfer and every answer comes back with the patent numbers behind it.
Try EurekaThe prior art anchoring this space
US20140339495A1 — Micro LED with wavelength conversion layer
A light emitting device and method of manufacture are described. In an embodiment, the light emitting device includes a micro LED device bonded to a bottom electrode, a top electrode in electrical contact with the micro LED device, and a wavelength conversion layer around the micro LED device. The wavelength conversion layer includes phosphor particles. Exemplary phosphor particles include quantum dots that exhibit luminescence due to their size, or particles that exhibit luminescence due to their composition.Filed by Apple Inc., 2014-11-20. One of the most-cited records in this corpus and a frequent citation anchor for later wavelength-conversion and bonding claims.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20140367633A1 | LED display with wavelength conversion layer | 599 |
| 2 | US20140367705A1 | Reflective bank structure and method for integrating a light emitting device | 354 |
| 3 | US20140339495A1 | Micro LED with wavelength conversion layer | 282 |
| 4 | US8794501B2 | Method of transferring a light emitting diode | 278 |
| 5 | US8987765B2 | Reflective bank structure and method for integrating a light emitting device | 255 |
| 6 | US20160155892A1 | Method for manufacturing a light emitted diode display | 242 |
| 7 | US8426227B1 | Method of forming a micro light emitting diode array | 230 |
| 8 | US9111464B2 | LED display with wavelength conversion layer | 225 |
| 9 | US20130285086A1 | Method of forming a micro LED device with self-aligned metallization stack | 195 |
| 10 | US20150137153A1 | Method for integrating a light emitting device | 185 |
Citation counts inside a searched corpus favour older filings; treat this table as a map of influential prior art rather than a ranking of current importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns stand out once family counts, IPC spread and receiving offices are read together.
The growth phase is over, not the technology
Filings rose steadily from 74 in 2017 to a peak of 217 in 2023, then flattened. High filing density in bonding and transfer claims means that claim space is occupied, not that the underlying manufacturing problem is solved — mass-transfer yield remains an open engineering issue even where the patent space around it is crowded.
No single-country clearance search is sufficient
China (522) and the United States (483) are within 8% of each other in filing volume, with WIPO, EPO, Korea and Taiwan each holding meaningful secondary shares. Freedom-to-operate work in micro-LED transfer needs to clear both major offices, not treat one as a proxy for the other.
Claims cluster on the die and transfer step
Every record in this set sits under H01L, with secondary density in H10P and the display-control classes G09F and G09G. Optical-element (G02B) and OLED-adjacent (H10K) classes are comparatively thin, pointing to unclaimed territory in the optical stack and hybrid display integration around the LED die itself.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to micro-led fabrication and transfer, with the prior art for and against each one.
Who is filing, and who has slowed down
Momentum data shows every major assignee — display makers, component specialists and device OEMs alike — recording zero filings in the most recent tracked year. Given the roughly 18-month gap between filing and publication, this is best read as a publication-pipeline effect rather than a genuine industry-wide pause, but it does mean recent-year rankings should be treated with caution.
BOE's internal filing network
The strongest co-assignee pairing in this dataset links BOE Technology Group with its Hefei-based display subsidiary at 11 shared filings, with two further BOE-affiliate pairings close behind. This pattern points to a filing strategy built around a cluster of related entities rather than a single filing arm.
OEM filers show the same pause as component makers
Apple and LuxVue both register zero filings in the latest tracked year alongside display-focused assignees such as BOE and Samsung Electronics, suggesting the slowdown is a publication-timing artefact spanning the whole competitive set rather than a shift specific to any one business model.
Collaboration is limited and mostly intra-group
Only nine co-assignee pairs appear across the full dataset, and the strongest examples all link a parent company to its own subsidiaries rather than to external partners. Cross-company joint filings between independent transfer-technology specialists and panel makers remain rare in the recorded data.
| Assignee | Recent year | YoY |
|---|---|---|
| PlayNitride Display (Shanghai) Co., Ltd. | 0 | -100% |
| Apple Inc. | 0 | — |
| LuxVue Technology Corporation | 0 | — |
| Samsung Electronics Co., Ltd. (South Korea) | 0 | — |
| BOE Technology Group Co., Ltd. | 0 | — |
| Lumens Co., Ltd. | 0 | — |
| Point Engineering Co., Ltd. | 0 | — |
| PlayNitride Inc. | 0 | -100% |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is clearance, licensing or R&D scoping.
Run a full freedom-to-operate check
With filings split almost evenly between China and the US, a clearance search limited to one office will miss roughly half the relevant art. Pull both jurisdictions before committing to a bonding or transfer process design.
Search this landscape in EurekaTrack the BOE filing cluster
The strongest co-assignee pairings all sit inside one corporate group. Watching that cluster's combined output, rather than any single entity, gives a more accurate read on where that group's claim coverage is heading.
Monitor assignee activity in EurekaScope the under-claimed optical and hybrid branches
Optical-stack integration and OLED-hybrid architectures carry noticeably lower IPC weight than the core transfer and bonding classes. That gap is worth validating against internal R&D roadmaps before assuming it is closed.
Explore white space in EurekaCommon questions about micro-LED fabrication patents
Filing activity in this dataset concentrates around a small group of display panel makers, component specialists and device OEMs, with BOE Technology Group's affiliate cluster showing the strongest internal co-filing pattern at 11 shared filings between two entities. Apple, Samsung Electronics, LuxVue and Lumens also appear among the assignees with sustained filing histories. No single company holds a dominant share of the 1,422 families tracked, so a full assignee-by-assignee ranking is needed before assuming any one player controls the space.
Patent publication typically lags the actual filing date by around 18 months, so the most recent one to two years in any filing trend will always understate true activity. The 2023 peak of 217 filings followed steady growth from 74 in 2017, and the apparent decline afterward is partly a publication-pipeline effect rather than proof that R&D investment has stopped. That said, the near-identical values at the 2022 midpoint and the 2023 peak suggest genuine growth had already begun slowing before the lag effect takes over the picture.
China leads with 522 filings and the United States follows closely at 483, together accounting for the large majority of activity in this dataset. WIPO's PCT route (123), the European Patent Office (106), South Korea (70) and Taiwan (47) make up meaningful secondary jurisdictions. Because China and the US sit so close in volume, a clearance or licensing analysis focused on only one of them will miss a substantial share of the relevant patent art.
IPC classification data shows the large majority of records sit under core semiconductor-device classes (H01L) and display-specific classes (G09F, G09G), while optical-element classes (G02B) and OLED-adjacent classes (H10K) carry noticeably less filing weight. That gap points to comparatively open claim space around optical-stack integration, hybrid OLED-microLED pixel architectures, and in-line defect repair steps performed after mass transfer. Thin coverage does not guarantee an area is unpatented elsewhere, but it does mark where a first-to-file claim is more likely to find room.
US20140339495A1, filed by Apple in 2014, is one of the most-cited records in this corpus and covers a micro LED device bonded between electrodes with a surrounding wavelength-conversion layer containing phosphor particles, including quantum dots. Anyone designing a micro-LED module that uses a wavelength-conversion layer built from phosphor or quantum-dot particles around a bonded LED die should review this filing's claim scope closely, since its high citation count indicates it is treated as foundational prior art across later filings in the same area. Design-around routes typically focus on alternative conversion-layer placement or materials outside the specific particle-based approach described.
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.