Thermal Interface Materials Patents: Top Companies & Trends 2026
- 26.5% concentration. The top 5 of 100 ranked assignees hold 1,225 of 4,630 records in scope — a leadership cluster, not a monopoly, with a long tail behind it.
- Filing eased, not collapsed. From 2021 to 2024 — the last complete year — filings moved from 275 to 257, a -7% shift, after peaking at 294 in 2019.
- Semiconductor packaging dominates the class mix. H01L appears on 43.9% of the 4,630 records, with H10W close behind at 34.1%, showing where claim density is heaviest.
Filing growth compares 2021 (275 records) with 2024 (257) — 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 4,630 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape maps 4,630 published patent records filed against thermal interface material technology aimed at power electronics — thermal grease, gap fillers, and related compounds addressing bond line thickness, pump-out, thermal impedance and aging stability under compression. The scope spans filings from 2015 through the 2026 data cut-off, with publication lagging filing by roughly 18 months, so the final one or two years in any trend chart will always look thinner than they eventually become.
The dataset draws from receiving offices led by the United States, with meaningful volume also filed through the EPO, WIPO's PCT route, and national offices including Austria, Germany and Canada — a spread that signals both device-level claims and materials-composition claims being pursued across multiple jurisdictions rather than a single home market.
Filing trends and technology composition
Two views of the same 4,630 records: how filing volume has moved year over year, and how the technology splits across IPC subclasses when a single record can carry more than one classification.
Filing trend, 2017–2026
Volume ran from 186 filings in 2017 to a peak of 294 in 2019, then eased toward 257 by 2024 — the last year that can be read as complete. The dip from 275 in 2021 to 257 in 2024 (-7%) is a real but modest pullback, not a collapse; 2025 and 2026 figures are still filling in as publication catches up.
IPC subclass composition
H01L (semiconductor devices) and H10W together anchor the field, appearing on 43.9% and 34.1% of records respectively. H05K (printed circuits) at 22.3% and materials-side classes C09K, C08K and C08L at single-digit-to-low-double-digit shares show the field splits between device integration and materials chemistry, with B32B (laminates) and G06F (digital processing, likely thermal-management control logic) as smaller adjacent slices.
Shares are the percentage of the 4,630 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Thermal Interface Materials for Power Electronics with Eureka
This page is one run against one query. Ask Eureka your own question about thermal interface materials for power electronics and every answer comes back with the patent numbers behind it.
Try EurekaA representative recent filing
Hybrid combination of thermal interface materials to mitigate thermal grease pump-out
An information handling system includes a processor package having a processor die and a first thermal interface material that is deposited on a surface of the processor die. A second thermal interface material is deposited on the surface of the processor die around a periphery of the first thermal interface material and encloses the first thermal interface material.Filed by Dell Products L.P., published 30 October 2025, this filing illustrates a common design pattern in the recent art: pairing two distinct thermal interface materials on the same die to address pump-out at the source rather than compensating for it downstream.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6595929B2 | System for monitoring health, wellness and fitness having a method and apparatus for improved measurement of … | 869 |
| 2 | US5475610A | Thermal cycler for automatic performance of the polymerase chain reaction with close temperature control | 796 |
| 3 | US6428189B1 | L.E.D. thermal management | 562 |
| 4 | US5602756A | Thermal cycler for automatic performance of the polymerase chain reaction with close temperature control | 486 |
| 5 | US7794141B2 | Thermal and conductivity sensing systems, devices and methods | 323 |
| 6 | US8292594B2 | Fluid pumping systems, devices and methods | 303 |
| 7 | US20140264818A1 | Polymer thermal interface material having enhanced thermal conductivity | 276 |
| 8 | US20150130045A1 | Thermally conductive structure for heat dissipation in semiconductor packages | 265 |
| 9 | US20030117770A1 | Carbon nanotube thermal interface structures | 248 |
| 10 | US20080058697A1 | Heat exchange systems, devices and methods | 243 |
Citation counts favour older records simply by virtue of being searchable longer — 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 findings that shape where a new filing is likely to face prior art, and where it is not.
Leadership is real but not exclusive
The top 5 of the 100 ranked assignees account for 1,225 of 4,630 records — just over a quarter of the field. That leaves the remaining three-quarters spread across a long tail, including single-filing entrants, which means device-level integration claims still have room even where a leader is active.
A plateau, not a decline
Filing volume peaked in 2019 at 294 and has since settled lower, with the 2021-to-2024 window showing a modest -7% move. Given the 18-month publication lag, reading 2025-2026 figures as a downturn would be premature; the field looks steady rather than exhausted.
Device integration outweighs raw materials chemistry
H01L and H10W together dominate the class mix, meaning most claim activity centres on how a thermal interface material is applied and integrated at the package level rather than on novel filler chemistry alone. C09K, C08K and C08L compositions sit well behind, at 10.5%, 9.6% and 7.7% respectively.
US-anchored, with a genuine PCT and EPO tail
The United States receives the largest single share of filings, but EPO (704) and WIPO/PCT (530) volumes are substantial enough that a freedom-to-operate check confined to the US alone would miss a meaningful part of the picture, particularly for materials-composition claims routed through Europe.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to thermal interface materials for power electronics, with the prior art for and against each one.
Who is filing, and where activity has cooled
The ranked leaders sit alongside a long tail; recent-year momentum data shows several of the largest historical filers pulling back sharply in the latest year, which is worth separating from the underlying 2021-2024 trend.
A clear leader, but not a runaway share
The top-ranked assignee holds 473 of 4,630 records — well ahead of fifth place at 167 — but still represents a minority of total filing activity, leaving substantial room for challengers building device-level integration portfolios.
A steep drop-off after the top tier
By tenth place, record counts have fallen to 90 — roughly a fifth of the leader's total — indicating that filing activity concentrates hard in the first several names before flattening into a much longer, thinner tail.
Historical leaders have gone quiet recently
Multiple assignees with substantial historical filing counts show zero filings in the latest year, with year-over-year drops as steep as -100%. That is consistent with the broader 18-month publication lag rather than necessarily signalling withdrawal from the space.
Co-filing is limited and concentrated
Only 10 co-assignee pairs appear in the dataset, and the strongest pairings link a single company to its own subsidiaries or named inventors rather than to independent third parties — suggesting most thermal interface material IP here is developed in-house rather than through joint filing arrangements.
| Assignee | Recent year | YoY |
|---|---|---|
| Taiwan Semiconductor Manufacturing Co., Ltd. (TSMC) | 2 | -87% |
| Intel Corp | 0 | -100% |
| Honeywell International Inc | 0 | -100% |
| International Business Machines Corporation (IBM) | 0 | — |
| Dow Silicones Corp | 0 | — |
| Laird Technologies Inc | 0 | -100% |
| 3M Innovative Properties Co | 0 | — |
| Eaton Intelligent Power Ltd | 0 | -100% |
Where to take this analysis
The landscape points to a field with a defined leadership cluster, a long tail of active filers, and technology weighted toward device integration over raw materials chemistry. The next steps depend on whether the goal is freedom-to-operate, portfolio benchmarking, or identifying a filing gap.
Run a freedom-to-operate check on integration claims
Given that H01L and H10W together cover the largest share of records, any new device-level TIM application design should be checked against the leadership cluster's integration claims before committing to a package architecture.
Explore with EurekaProbe the under-claimed materials branches
Compression-force-adaptive fillers and boron nitride loading optimization show thinner filing density than the core device classes, making them worth a deeper prior-art pull before drafting new composition claims.
Explore with EurekaTrack momentum, not just historical share
Several long-standing leaders show sharp pullbacks in the latest year; before assuming a competitor has exited, weigh that against the 18-month publication lag and re-check once later-year data fills in.
Explore with EurekaCommon questions about this landscape
The leading assignee in this dataset holds 473 of the 4,630 records in scope, with the top five combined accounting for 1,225 records, or 26.5% of the field. That leaves nearly three-quarters of filings spread across a long tail of 100 ranked assignees, including many single-filing entrants. A quarter-share concentration means the field has recognisable leaders but is far from a monopoly, so newer entrants still have room to build a defensible position, particularly outside the core device-integration classes.
Filing volume peaked in 2019 at 294 records and has since eased, with the 2021-to-2024 window showing a -7% move from 275 to 257 filings. Because publication lags filing by roughly 18 months, the years closest to the data cut-off will always understate true activity, so the 2025-2026 figures should not be read as a decline. Taken over the complete years available, the field looks like a plateau rather than either sustained growth or a genuine downturn.
Semiconductor device integration dominates: H01L appears on 43.9% of the 4,630 records and the closely related H10W class on 34.1%, meaning most claim activity concerns how a thermal interface material is packaged and applied at the device level. Printed circuit assembly claims under H05K follow at 22.3%. Materials-composition classes such as C09K, C08K and C08L trail well behind at 10.5%, 9.6% and 7.7% respectively, suggesting materials chemistry is comparatively less crowded than integration architecture.
The technology composition data points to materials-composition and control-logic branches as comparatively thin relative to the dominant device-integration classes. Specific sub-areas worth checking include compression-force-adaptive gap fillers, boron nitride filler loading optimization, aging-stability test protocols, and pump-out-resistant multi-material stacks. High filing density in H01L and H10W means claim space there is occupied, not that those adjacent branches are technically exhausted — a targeted prior-art search in the thinner classes is the practical next step before drafting.
US20250336756A1, filed by Dell Products L.P. and published 30 October 2025, claims a processor package that uses two distinct thermal interface materials on the same die — a primary material on the die surface and a second material placed around its periphery to enclose it. The stated purpose is mitigating thermal grease pump-out, a known reliability failure mode under thermal cycling. It is a useful marker of where recent device-level claim activity sits: multi-material stacking at the die level rather than single-compound reformulation.
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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.