Encapsulants and Potting Compounds Patents: Leaders & Trends 2026
- 43.2% concentration. The top 5 of 48 ranked assignees hold 76 of the 176 records in scope — filing is concentrated at the top with a long tail below.
- Filing has cooled since 2022. Activity peaked at 14 records in 2022 and has since declined, with the most recent year understated by publication lag.
- H01L dominates, H10W is close behind. 87.5% of records sit in semiconductor-device class H01L and 60.8% in H10W, leaving polymer-chemistry classes comparatively thin.
What this landscape covers
Encapsulants and potting compounds sit at the intersection of semiconductor packaging and polymer chemistry: materials that manage exotherm during cure, absorb CTE mismatch stress between dissimilar substrates, control moisture and ion content, and still allow reworkability where the assembly needs to be serviced. The 176 records in scope span 2015 through mid-2026 and are drawn from filings that combine encapsulant or potting-compound terminology in the title with cure-, stress- or reliability-specific language in the claims and description.
The IPC mix confirms this is a packaging-first field rather than a materials-first one: semiconductor device classes carry the bulk of the filing activity, while dedicated polymer-composition and condensation-polymer classes are present but secondary. That skew matters for anyone scoping freedom-to-operate — the crowded claim space is in how the encapsulant is integrated into the package, not necessarily in the resin chemistry itself.
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Filing trend and technology composition
Two views of the same 176-record dataset: activity over time, and how records distribute across IPC subclasses (a record can carry more than one class, so shares add to more than 100%).
A flat-to-declining trend since the 2022 peak
Filings rose from 6 records in 2017 to a peak of 14 in 2022, then eased off. Because publication typically lags filing by around 18 months, the final year or two in the trend will always read lower than the true filing rate — treat the most recent points as provisional, not as a real drop-off.
H01L and H10W carry the field
H01L (semiconductor devices) appears in 87.5% of the 176 records and H10W in 60.8%, confirming that most activity is packaging-centric. C08G condensation-polymer chemistry (29.5%), H05K circuit assemblies (22.2%) and C08L polymer compositions (19.9%) are present but noticeably thinner, and B23K joining processes (10.8%) and B32B laminates (10.2%) are the smallest classes tracked here.
Shares are the percentage of the 176 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Encapsulants and Potting Compounds with Eureka
This page is one run against one query. Ask Eureka your own question about encapsulants and potting compounds and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records and a recent representative filing
Potted electronic circuit (US20230360988A1)
The filing covers an electronic circuit built on a circuit carrier with conductor tracks and components covered by a potting compound, where a separating layer of electrically insulating material sits between the base layer and the potting compound in the gaps between conductor tracks. That separating layer is the point of novelty: it manages the interface stress and dielectric performance where the potting compound meets the metallized base layer, rather than relying solely on the compound's own bulk properties.Filed by Semikron Elektronik; published 2023-11-09.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6376769B1 | High-density electronic package, and method for making same | 657 |
| 2 | US6335571B1 | Semiconductor flip-chip package and method for the fabrication thereof | 406 |
| 3 | US6121689A | Semiconductor flip-chip package and method for the fabrication thereof | 265 |
| 4 | US6399426B1 | Semiconductor flip-chip package and method for the fabrication thereof | 178 |
| 5 | US6518677B1 | Semiconductor flip-chip package and method for the fabrication thereof | 156 |
| 6 | US5471027A | Method for forming chip carrier with a single protective encapsulant | 154 |
| 7 | US5577319A | Method of encapsulating a crystal oscillator | 94 |
| 8 | US20020031868A1 | Semiconductor flip-chip package and method for the fabrication thereof | 91 |
| 9 | US6774493B2 | Semiconductor flip-chip package and method for the fabrication thereof | 82 |
| 10 | US6566234B1 | Semiconductor flip-chip package and method for the fabrication thereof | 80 |
Citation counts accumulate over time and favour older filings — read them as a signal of influence within this corpus, not as a ranking of current technical 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 worth acting on before drafting new claims or scoping a competitor.
The leader sits well ahead of the field
The leading assignee holds 29 records against a fifth-place figure of 9 and a tenth-place figure of 6 — a steep drop-off rather than a gradual one. That shape suggests one or two players built an early, still-defended position while the rest of the ranked list files opportunistically.
Recent-year activity has gone quiet across the leaders
Several of the most-cited historical assignees show zero filings in the latest tracked year. Combined with the overall peak in 2022 and the decline since, this reads as a mature claim space rather than an actively contested one — new entrants are more likely to find open ground than a fight over incumbents' claims.
Packaging integration is claimed far more than resin chemistry
H01L's 87.5% share dwarfs C08G's 29.5%, which tells a filer where the density actually is: claims on how the potting compound interfaces with the package (separating layers, carrier geometry, cure-stress management at the joint) are far more contested than claims on the polymer formulation itself.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to encapsulants and potting compounds, with the prior art for and against each one.
Who is filing, and where the gaps sit
The ranked list of 48 assignees is dominated by a handful of semiconductor and materials companies with long filing histories; almost all recent-year momentum among the named leaders has gone to zero, which is itself informative.
One assignee anchors the field
The leading assignee's 29 records is more than triple the fifth-place figure of 9, indicating a defended core position rather than a crowded contest at the very top.
A steep drop after the leader, then a long tail
Positions five through ten cluster in single digits, and the ranking runs to 48 companies total — most of that list holds only a handful of records each, typical of a field with one dominant early filer and many opportunistic entrants.
The named incumbents have gone quiet recently
Assignees that built substantial historical positions show no filings in the most recent tracked year. That does not necessarily mean disengagement — it is consistent with the broader 2022 peak-and-decline pattern and the normal publication lag on very recent filings.
| Assignee | Recent year | YoY |
|---|---|---|
| Infineon Technologies AG | 0 | — |
| National Starch and Chemical Investment Holding Corporation | 0 | — |
| Medtronic, Inc. | 0 | — |
| International Business Machines Corporation | 0 | — |
| Georgia Tech Research Corporation | 0 | — |
| Hughes Aircraft Company | 0 | — |
| Wolfspeed, Inc. | 0 | — |
| Aguila Technologies | 0 | — |
Where to take this next
The landscape points to two practical next steps depending on whether the goal is defence or expansion.
Check freedom-to-operate against the H01L-heavy core
Because the packaging-integration classes carry the bulk of filing density, any new encapsulant product that touches carrier geometry, separating layers, or die-to-substrate interfaces should be checked against the leading assignee's position before drafting.
Run an FTO search in EurekaScope the under-claimed resin-chemistry branches
C08G and C08L classes are present but thin relative to H01L, and the gate chips above point to specific sub-areas — reworkable debonding chemistries and moisture/ion-barrier formulations among them — where a well-drafted first claim has more room to stand.
Explore white space in EurekaCommon questions about this landscape
The ranking covers 48 assignees, with the leader holding 29 of the 176 records in scope — more than triple the fifth-place figure of 9. The top 5 assignees together hold 76 records, or 43.2% of all records, while the top 10 hold 110 records, or 62.5%. That is a concentrated field at the top with a long tail of smaller filers below rank ten.
Filing activity rose from 6 records in 2017 to a peak of 14 in 2022 and has declined since. Because patent publication typically lags actual filing by around 18 months, the most recent one or two years in any trend chart will understate true activity, so the apparent decline should be read cautiously for the very latest period. Even accounting for that lag, the overall shape is flat-to-declining rather than accelerating.
Semiconductor device class H01L appears in 87.5% of the 176 records in scope, and H10W in 60.8%, making this predominantly a packaging-integration field. Polymer-chemistry classes are present but smaller: C08G condensation polymers at 29.5%, H05K circuit assemblies at 22.2%, and C08L polymer compositions at 19.9%. Since a single record can carry several IPC codes, these shares add to well over 100% and should not be summed into a single total.
US20230360988A1, filed by Semikron Elektronik and published 2023-11-09, covers a potted electronic circuit where an electrically insulating separating layer sits between the base layer and the potting compound in the gaps between conductor tracks. The novelty is in that interface layer managing stress and dielectric performance at the boundary, not in the potting compound's bulk formulation. Anyone designing a similar carrier-plus-potting-compound package with an interposed insulating layer in that specific location should review this claim set closely.
The clearest gaps sit in resin-side chemistry rather than packaging integration: low-exotherm cure kinetics for thick-section potting, reworkable debonding chemistries, moisture and ion-barrier formulations, CTE-graded interface layers, and dielectric-strength retention under thermal cycling are all comparatively thin relative to the H01L-heavy packaging core. These are not unclaimed, but filing density there is far lower than in carrier and interconnect geometry claims, which is where a new entrant is more likely to secure a defensible first claim.
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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.