Thin Film Encapsulation Patents: Leaders, Trends & White Space 2026
- 19.2% concentration at the very top. The five leading assignees together hold 2,132 of the 11,077 records in scope — a real lead, but not a lockout.
- Filing has cooled from its 2018 peak. 544 records published in 2018 versus 39 so far in the partial 2026 year, with a documented -34% move from 490 (2021) to 325 (2024).
- Packaging-class filings rival semiconductor-class ones. B65D containers & packaging appears on 14.9% of records, close behind H01L semiconductor devices at 16.7% — barrier chemistry is being claimed as much as device structure.
Filing growth compares 2021 (490 records) with 2024 (325) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 11,077 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Thin film encapsulation (TFE) is the barrier technology that keeps moisture and oxygen away from the organic layers in a flexible OLED stack without adding the rigidity of glass lids. This landscape draws on 11,077 published records filed or granted between 2015 and the 2026 data cut-off, searched against language covering thin film encapsulation, barrier layer stack, moisture barrier, water vapor transmission, particle covering, inorganic-organic stacks, crack propagation, bending durability and deposition temperature.
The dataset spans both device-side claims (thin film transistor passivation, gate insulation) and materials-side claims (polymer barrier films, wound-dressing-derived barrier chemistry, coating deposition), which is why the technology composition below spreads across semiconductor, packaging and polymer classes rather than sitting inside a single IPC subclass.
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Filing trend and technology composition
Two views of the same 11,077-record dataset: how filing activity has moved year over year, and which IPC subclasses carry the claim volume.
Filing trend, 2017–2026
Publications rose from 420 in 2017 to a peak of 544 in 2018, then eased through the following years. The documented move from 490 filings in 2021 to 325 in 2024 is a -34% change; 2025 and 2026 are still filling in because publication lags filing by roughly 18 months, so the apparent drop in the most recent two years should not be read as the current filing rate.
Technology composition by IPC subclass
B32B (layered products & laminates) leads at 30.4% of the 11,077 records, followed by H01L (semiconductor devices) at 16.7% and B65D (containers & packaging) at 14.9%. H10K, the OLED-specific organic semiconductor class, sits at 13.4% — a reminder that most of the barrier innovation here is being claimed as materials or packaging art rather than as device art. Records can carry multiple classes, so these shares add up to more than 100%.
Shares are the percentage of the 11,077 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Thin Film Encapsulation for Flexible OLED with Eureka
This page is one run against one query. Ask Eureka your own question about thin film encapsulation for flexible oled and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited prior art
US12317543B2 — Moisture barrier film having low refraction index and low water vapor transmission rate
Filed by Applied Materials and published 2025-05-27, this record claims a silicon oxynitride moisture barrier film with a refractive index below about 1.5 and a water vapor transmission rate below about 5.0×10⁻⁵ g/m²/day, used as a first barrier layer in a thin film encapsulation structure and doubling as a passivation or gate insulating layer in the accompanying thin film transistor.Numbers as stated in the filing's abstract.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4373519A | Composite wound dressing | 1,762 |
| 2 | US20070163880A1 | Analyte sensor | 967 |
| 3 | US6413645B1 | Ultrabarrier substrates | 939 |
| 4 | US6153209A | Article having a transferable breathable skin care composition thereon | 795 |
| 5 | US20100210745A1 | Molecular Healing of Polymeric Materials, Coatings, Plastics, Elastomers, Composites, Laminates, Adhesives, a… | 718 |
| 6 | US20160029998A1 | Systems and methods for locating and/or characterizing intragastric devices | 708 |
| 7 | US6734090B2 | Method of making an edge seal for a semiconductor device | 606 |
| 8 | US20100255625A1 | Method and apparatus for atomic layer deposition using an atmospheric pressure glow discharge plasma | 563 |
| 9 | US20050227502A1 | Method for forming an ultra low dielectric film by forming an organosilicon matrix and large porogens as a te… | 554 |
| 10 | US6602806B1 | Thermal CVD process for depositing a low dielectric constant carbon-doped silicon oxide film | 553 |
Citation counts inside a searched corpus favour older filings and should be read as a signal of influence on the field, not as a ranking of current importance.
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Browse MCP servers →What the numbers say about the field
Read together, concentration, technology composition and momentum point to a field where the top of the ranking is real but not closed, and where packaging-derived barrier chemistry is doing as much work as device engineering.
A lead, not a lockout
The leading assignee holds 827 records and the fifth-ranked holds 267 — a steep drop-off inside the top five, followed by a long tail across the full 100-company ranking. Combined, the top 10 hold 27.8% of all records, meaning nearly three-quarters of the field sits outside the leading group.
Cooling from a 2018 peak, not collapsing
Publications peaked at 544 in 2018 and the last fully comparable years show filings moving from 490 (2021) to 325 (2024). Because publication lags filing by around 18 months, 2025-2026 figures are still incomplete and should not be read as continued decline.
Barrier chemistry outweighs device claims
B32B (layered products & laminates) and B65D (containers & packaging) together sit ahead of the OLED-specific H10K class, which appears on only 13.4% of records. Encapsulation innovation in this dataset is being claimed largely as materials and packaging art.
Co-filing is rare and concentrated
Only 10 co-assignee pairs appear across the dataset, and the strongest of them link a single materials major with named individual inventors rather than with another corporate assignee — collaboration here looks more like internal inventor networks than cross-company alliances.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to thin film encapsulation for flexible oled, with the prior art for and against each one.
Who is filing, and where momentum is shifting
The ranked leaders include display makers, materials majors and packaging/consumer-goods companies whose barrier chemistry crosses over from unrelated products such as wound dressings and skin-care films. Recent-year momentum diverges sharply from the historical leaders.
Samsung Display holds the top position
Samsung Display leads the ranking on record count but shows a -91% year-on-year drop in its latest-year filings, consistent with a maturing core claim position rather than fresh land-grab activity.
Historical leaders have gone quiet in the newest year
Dow Global Technologies, Johnson & Johnson Vision Care, LG Chem and 3M Innovative Properties all show zero filings in the latest year of this dataset, which given the 18-month publication lag may understate rather than confirm withdrawal.
Procter & Gamble is filing more, not less
Against a backdrop of cooling activity from the historical leaders, Procter & Gamble's latest-year filings rose sharply, a signal worth tracking given the crossover between consumer barrier films and OLED-grade barrier chemistry.
| Assignee | Recent year | YoY |
|---|---|---|
| Samsung Display Co., Ltd. | 7 | -91% |
| Procter & Gamble Co. | 7 | +600% |
| Dow Global Technologies LLC | 0 | — |
| Johnson & Johnson Vision Care, Inc. | 0 | — |
| LG Chem Ltd. | 0 | — |
| 3M Innovative Properties Co. | 0 | — |
| Mobil Oil Corp. | 0 | — |
| E.I. du Pont de Nemours & Co. | 0 | — |
Where to take this analysis
The published-record view above is a starting point. Turning it into a filing or freedom-to-operate decision means drilling into specific claim language and specific assignees.
Map the white space branches to your own stack
Run the under-claimed sub-areas above against your actual barrier material and deposition process to see which are genuinely open versus lightly claimed by a name not visible in this summary.
Explore in Patsnap EurekaTrack the movers, not just the leader
A -91% swing at the top and a +600% swing further down the ranking both matter more for a 2026 filing decision than the raw leaderboard order.
Monitor assignee activityCommon questions about this landscape
Samsung Display leads the ranked assignees with 827 records in this dataset, well ahead of the fifth-placed assignee at 267. The top five assignees together account for 2,132 records, which is 19.2% of the 11,077 records in scope — a real concentration at the top but far from a monopoly, since more than 80% of records sit outside the leading five names. The full ranking runs to 100 companies, so there is a substantial long tail beyond the visible leaders.
Filings peaked in 2018 at 544 published records and have eased since; the last two fully comparable years show a move from 490 filings in 2021 to 325 in 2024, a documented -34% change. However, publication typically lags actual filing by around 18 months, so the lower counts shown for 2025 and 2026 in most datasets reflect incomplete data rather than a real collapse in activity. Treat any 2025-2026 figures as a floor, not a final count.
B32B, the IPC subclass covering layered products and laminates, appears on 30.4% of the 11,077 records in scope, the largest single share. H01L (semiconductor devices) and B65D (containers & packaging) follow at 16.7% and 14.9% respectively, with the OLED-specific H10K class at 13.4%. Because a single record can carry several IPC classes, these percentages add up to more than 100% and should be read as claim-density signals per class rather than a strict breakdown of the whole field.
Thin film encapsulation search language overlaps heavily with barrier-film and moisture-transmission claims originally developed for wound dressings, skin-care films and packaging, which is why consumer-goods and materials companies show up alongside display makers. Several of the most-cited records in this dataset, including a composite wound dressing patent and a breathable skin-care composition patent, are barrier-science prior art rather than OLED-specific filings. This crossover is a genuine feature of the barrier-chemistry field, not a search artefact, and it means freedom-to-operate work in this space should not stop at display-industry assignees.
US12317543B2, filed by Applied Materials and published 2025-05-27, claims a silicon oxynitride moisture barrier film with refractive index below about 1.5 and water vapor transmission rate below about 5.0×10^-5 g/m2/day, used simultaneously as a first TFE barrier layer and as a passivation or gate insulating layer in the adjoining thin film transistor. Anyone targeting the same material family and performance thresholds for a combined barrier-plus-passivation role should review this claim's exact numeric boundaries closely, since staying outside either the refractive index or transmission rate threshold, or avoiding the dual-role architecture, are the most direct ways to design around it. This is one representative record among 11,077, so a full freedom-to-operate check should not rely on it alone.
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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.