MicroLED Display Repair Patents: Who Leads, Where the Gaps Are 2026
- 82.8% of the field sits with five companies. The top 5 assignees combined account for 53 of the 64 records in scope — a tightly held claim set for anyone entering fresh.
- Filing peaked in 2017 at 7 records. That is the highest single year on record; more recent years understate true activity because publication lags filing by roughly 18 months.
- Inspection and imaging outweigh display circuitry. H01L semiconductor-device claims cover 68.8% of records, while G09G display-control claims sit at 23.4% — repair is claimed mostly as a fab process, not a display feature.
Top-5 share is the combined record count of the five largest assignees divided by all 64 records in scope (CR5), not by the ranked leaders only.
What this patent set actually covers
MicroLED display repair and yield technology addresses a manufacturing bottleneck rather than a display feature: identifying defective emitters before or after mass transfer, and either reworking them or routing around them with redundancy. The search string underlying this landscape combines defect detection language (electroluminescence testing, defect maps, inspection before transfer) with remediation language (known good die, repair cost models, redundant emitters, rework capability), which is why the resulting 64 records lean heavily on inspection and metrology classes alongside core semiconductor-device claims.
Most of the activity traces back to wafer- and panel-level inspection systems built for earlier display and semiconductor generations, then extended to cover microLED-specific defect signatures. That lineage shows up directly in the most-cited records, which are automated wafer defect inspection patents rather than microLED-native filings — a reminder that foundational inspection claims can still constrain how a newer repair method must be described.
Filing trend and technology composition
Two views of the same 64 records: filings by year, and the IPC subclasses those records carry. Because a single record can carry more than one class, the composition shares add up to more than 100%.
Filing trend, 2017–2026
Filings peaked at 7 records in 2017, the highest single year in the dataset. Activity in the most recent years reads lower, but publication lag of roughly 18 months means the last one to two years are always undercounted at the point of any data pull.
IPC subclass composition (share of 64 records)
H01L (semiconductor devices) appears on 68.8% of records, confirming that repair and yield claims are drafted primarily as semiconductor-fabrication processes. G06T (image processing), G01B (dimensional measurement) and G01N (material analysis) each sit near a quarter of records, reflecting the machine-vision and metrology backbone behind defect detection, while G09G (display control circuits) and H10K (organic semiconductors) are present but secondary.
Shares are the percentage of the 64 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on MicroLED Display Repair and Yield with Eureka
This page is one run against one query. Ask Eureka your own question about microled display repair and yield and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this field
US20170256466A1 — Automated optical inspection of unit specific patterning
An automated optical inspection (AOI) system aligns a wafer carrying a plurality of unit-specific patterns, generates a unique electrical-net reference standard for each pattern via computer processing, captures an image of each pattern with a camera, extracts boundaries of contiguous conductive regions from that image, and flags defects by comparing extracted boundaries against the generated reference.Filed by DECA Technologies USA — a repeat filer in this space — this record ties inspection directly to per-unit electrical-net references rather than a fixed golden-die template.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6324298B1 | Automated wafer defect inspection system and a process of performing such inspection | 370 |
| 2 | US6937753B1 | Automated wafer defect inspection system and a process of performing such inspection | 143 |
| 3 | US20070211426A1 | Thin multichip flex-module | 123 |
| 4 | US6826298B1 | Automated wafer defect inspection system and a process of performing such inspection | 99 |
| 5 | US20070212920A1 | Thin multichip flex-module | 90 |
| 6 | US20070212906A1 | Thin multichip flex-module | 88 |
| 7 | US20050008218A1 | Automated wafer defect inspection system and a process of performing such inspection | 86 |
| 8 | US20180269234A1 | Assembly of semiconductor devices | 85 |
| 9 | US20070211711A1 | Thin multichip flex-module | 76 |
| 10 | WO2017037475A1 | Assembly of semiconductor devices | 69 |
Citation counts are a signal of influence within the searched corpus, not of current commercial relevance — older wafer-inspection patents accumulate citations simply by being first.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the filing pattern tells you
Three read-outs from the data: where influence concentrates, what the technology mix implies about where value is claimed, and what the receiving-office spread says about where protection has actually been sought.
Foundational inspection art still anchors the field
The most-cited record, US6324298B1, is a general automated wafer defect inspection system, not a microLED-specific filing. Three of the five most-cited records share that same inspection-system lineage, meaning a chunk of the field's citation weight sits on pre-microLED prior art.
Repair is claimed as a fab process, not a display circuit
H01L dominance alongside secondary G06T/G01B/G01N presence shows claims are built around semiconductor-device structure and machine-vision measurement, with display-control language (G09G, 23.4%) trailing behind. Anyone drafting purely around display-driver logic is working in a thinner part of the art.
Protection is concentrated in the US, with a modest EPO and PCT tail
United States filings outnumber the next largest office, EPO, by more than three to one, with WIPO/PCT, UK and German counts smaller still. A filer targeting only European protection would be operating against a noticeably thinner prior-art wall than one filing in the US.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to microled display repair and yield, with the prior art for and against each one.
The assignee landscape
Fifteen companies make up the entire ranked list the dataset returns — this is not a top-50 or top-100 cut, it is the whole ranking. The leader holds 16 records against a fifth-place figure of 4 and a tenth-place figure of 1, and the top 10 together account for all 64 records in scope, leaving no long tail of unranked filers outside this group.
Five companies hold the large majority of the field
The top 5 assignees combined cover 53 of the 64 records in scope. That is a tight cluster for a field with only 64 total records, meaning a new entrant is filing directly against a small number of well-established claim holders rather than a fragmented crowd.
No activity exists outside the ranked group
The top 10 assignees combined account for every one of the 64 records in scope. There is no unranked long tail in this dataset — all documented filing activity in microLED repair and yield traces back to the fifteen companies the ranking covers.
Recent-year filing shows no fresh activity among tracked names
The assignees tracked for recent-year momentum each show zero filings in the latest year. Given the roughly 18-month publication lag, this understates real activity, but it also means no single company is visibly pulling ahead in the most current window.
| Assignee | Recent year | YoY |
|---|---|---|
| August Technology Corp | 0 | — |
| MICROELECTRONICS ASSEMBLY TECHNOLOGIES INC | 0 | — |
| Meta Platforms Technologies, LLC | 0 | — |
| Rudolph Technologies, Inc. | 0 | — |
| Oculus VR, Inc. | 0 | — |
| Microelectronics Assembly Technologies, Inc. | 0 | — |
| International Business Machines Corporation | 0 | — |
| INFINILED | 0 | — |
Where to take this analysis
This landscape shows concentration and composition; the next layer of work is claim-level, jurisdiction-specific and forward-looking.
Run a freedom-to-operate check against the top 5
With 82.8% of records held by five assignees, a claim chart against that group's independent claims is the highest-leverage next step before committing to a design.
Explore in Patsnap EurekaTrack the under-claimed branches for early filing
Redundant-emitter routing and repair cost-model claims sit well below the H01L core; a first-mover claim there faces a thinner prior-art wall.
Explore in Patsnap EurekaRe-check citation-anchor patents for expiry and status
Several of the most-cited records are older wafer-inspection filings; confirming their current legal status can reopen space assumed to be blocked.
Explore in Patsnap EurekaCommon questions on microLED repair and yield patents
The dataset's ranked list covers fifteen companies, with the leader holding 16 of the 64 records in scope. The top 5 assignees together account for 82.8% of all records, so the field is concentrated rather than fragmented. Any new entrant should expect to file directly against this small group's existing claims rather than into open white space at the core of the technology.
Based on the IPC composition, the bulk of activity sits in H01L semiconductor-device claims (68.8% of records), meaning repair is largely claimed as a fabrication-process problem — identifying and reworking defective die or emitters at the wafer or panel level. Supporting classes include G06T image processing, G01B dimensional measurement and G01N material analysis, all used to detect and characterise defects, while G09G display-control claims are comparatively secondary at 23.4%.
The data shows filing peaked in 2017 at 7 records, the highest single year on record, with activity appearing lower in subsequent years through the 2026 data cut-off. Because publication typically lags filing by around 18 months, the most recent one to two years understate real filing activity and should not be read as a genuine slowdown without a later data pull. A reliable growth rate is not computable from the years currently complete in this dataset.
US20170256466A1, filed by DECA Technologies USA, claims an automated optical inspection method that builds a unique electrical-net reference standard per unit-specific pattern rather than comparing against one fixed golden-die image, then extracts conductive-region boundaries from a captured image to flag defects. A system that generates per-die reference standards this way and compares extracted boundaries against them sits close to this claim scope. Systems using a single fixed reference template across all die, or that skip electrical-net-based reference generation entirely, are more likely to sit outside it, though a full claim chart is needed to confirm design-around status.
Relative to the dense H01L and inspection-metrology core, sub-areas like redundant-emitter routing logic, repair cost-model claims, and post-transfer rework tooling show thinner representation in this dataset. H10K (organic semiconductor / OLED-adjacent) claims sit at only 9.4% of records, suggesting cross-over repair methods between OLED and microLED are comparatively under-claimed. These are the branches where a first, well-drafted independent claim faces less prior art to design around.
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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.