Vapor Chamber Smartphone Patents: Leaders, Trends & White Space 2026
- Filing has cooled since its 2019 peak. 42 families published that year against 15 in 2017 and just 2 in the most recent (partial) year — a flattening curve, not a growing one.
- Claim activity spans four IPC clusters at once. F28D heat-exchange apparatus (160 records) and H05K circuit assemblies (136) dominate, but H01L semiconductor and G06F data-processing filings show thermal claims are increasingly tied to chip and system architecture, not just the vapor chamber itself.
- The most-cited prior art predates the smartphone era. The five most-cited records include sintered-wick and heat-pipe patents filed for desktop and server ICs, meaning the foundational claim space in wick structures was staked out before mobile form factors existed.
What this landscape covers
Vapor chambers and ultra-thin heat spreaders move heat away from a smartphone’s system-on-chip fast enough to sustain performance without throttling, inside a package often under a millimetre thick. The patent activity tracked here sits at the intersection of thermal engineering (capillary wick geometry, working fluid selection, casing fabrication) and mobile device integration (thickness constraints, hotspot mapping, sustained-performance claims tied to specific chip layouts). Records span four IPC subclasses, from classical heat-exchange apparatus (F28D) through printed circuit assemblies (H05K) to semiconductor packaging (H01L) and system-level data processing (G06F).
Coverage runs from 2015 through the middle of 2026; because publication typically lags filing by around 18 months, the last one to two years of the trend will read lower than the true filing volume once those applications publish.
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Filing trend and technology composition
Two views of the same 248-family dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim weight.
A peak already behind it
Filings rose from 15 in 2017 to a peak of 42 in 2019, then fell back toward 11 by the 2022 midpoint and down to single digits approaching the data cut-off. Read the final one to two years as understated rather than as a genuine collapse in interest.
Four subclasses carrying the claims
F28D (heat-exchange apparatus, 160 records) and H05K (printed circuits and assemblies, 136) are the two largest clusters, with H01L (semiconductor devices, 65) and G06F (digital data processing, 61) showing that a meaningful share of filings tie thermal structures to specific chip or system designs rather than treating the vapor chamber as a standalone component.
Shares are the percentage of the 248 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Vapor Chamber and Heat Spreader for Smartphones with Eureka
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Isothermal vapor chamber and support structure thereof
Describes a vapor chamber whose capillary wick is reinforced internally by a support structure of wavy plates connected between two side panels, with wave peaks on adjacent plates installed alternately to form internal partitions. The design targets isothermal performance while keeping the wick mechanically supported under compression.Filed by Celsia Technologies Taiwan; published 2009-08-20.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20060196640A1 | Vapor chamber with boiling-enhanced multi-wick structure | 151 |
| 2 | US6302192B1 | Integrated circuit heat pipe heat spreader with through mounting holes | 138 |
| 3 | US6650544B1 | Integrated circuit chip cooling structure with vertical mounting through holes | 102 |
| 4 | US6997245B2 | Vapor chamber with sintered grooved wick | 89 |
| 5 | US6880626B2 | Vapor chamber with sintered grooved wick | 83 |
| 6 | US6896039B2 | Integrated circuit heat pipe heat spreader with through mounting holes | 66 |
| 7 | US20040069455A1 | Vapor chamber with sintered grooved wick | 65 |
| 8 | US6738257B1 | Heat sink | 63 |
| 9 | US20140247556A1 | Heat removal in an integrated circuit assembly using a jumping-drops vapor chamber | 60 |
| 10 | US20200350229A1 | Integrated heat spreader with enhanced vapor chamber for multichip packages | 48 |
Citation counts reward older filings simply for having more time to accumulate citations inside this corpus — treat this as a map of foundational claim territory, not a ranking of current relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers imply for a filing decision
Three patterns matter more than the raw counts: where claim density already sits, where it is tied to chip design rather than the thermal component alone, and where the receiving-office spread points to enforcement priorities.
The category has passed its filing peak
Volume climbed from 15 filings in 2017 to 42 in 2019, then declined through an 11-filing midpoint in 2022 to 2 in the most recent partial year. Even allowing for publication lag, the shape is a cooling curve rather than sustained growth, which argues for targeted claims over broad new platform filings.
Thermal claims are increasingly chip-specific
126 records sit in semiconductor device (H01L) or digital data-processing (G06F) subclasses alongside the core F28D and H05K thermal classes. That overlap means new entrants should check chip-layout and system-architecture claims, not just wick and casing patents, before finalising a design.
US filings still lead, but coverage is fragmented
The United States accounts for the largest single share of receiving-office filings, with Europe, China, WIPO/PCT, Taiwan and India each holding a meaningful but smaller slice. A single-jurisdiction filing strategy leaves most of the remaining market uncovered.
Wick-structure claims were staked out early
The most-cited records in this corpus are sintered-wick and heat-pipe patents originally aimed at desktop and server ICs, some over two decades old. Any new capillary-wick claim needs freedom-to-operate analysis against this older, IC-cooling-era art, not just recent smartphone-specific filings.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to vapor chamber and heat spreader for smartphones, with the prior art for and against each one.
Who is filing, and who has slowed
Recent-year momentum across the tracked assignees is low across the board: the single named entity with any latest-year activity recorded just one filing, down 80% year-on-year, while several others show zero. That pattern is consistent with a category past its filing peak rather than one with an active leader pulling away.
Samsung Electronics (Korea)
The only assignee in the tracked momentum list with any filings in the latest year, though down sharply from the prior year — consistent with the category-wide slowdown rather than an isolated pullback.
Lenovo, Intel, Microsoft, Cooler Master, Guangzhou Liji
Several previously active assignees, spanning device OEMs, chipmakers and dedicated thermal-solution suppliers, show no recorded filings in the latest tracked year. This does not rule out unpublished applications given the publication lag, but it does mark a visible pause in disclosed activity.
Limited but concentrated co-filing
Co-assignee activity is rare across this dataset overall, but one pairing — a components manufacturer and a thermal-technology specialist — accounts for the majority of shared filings, suggesting a supplier relationship rather than broad industry-wide joint development.
| Assignee | Recent year | YoY |
|---|---|---|
| Samsung Electronics Co., Ltd. (Korea) | 1 | -80% |
| Lenovo (Singapore) Pte. Ltd. | 0 | — |
| Intel Corporation | 0 | — |
| Microsoft Technology Licensing, LLC | 0 | — |
| Cooler Master Co., Ltd. | 0 | — |
| Guangzhou Liji Thermal Management Technology Co., Ltd. | 0 | — |
| Murata Manufacturing Co., Ltd. | 0 | -100% |
| Polar Technology Co., Ltd. | 0 | — |
Where to take this
The filing curve and citation map point to specific next steps depending on whether you are clearing a design or scouting a gap.
Run freedom-to-operate on wick geometry
The most-cited prior art in this corpus predates smartphone-specific applications and covers core sintered and grooved wick structures. Any new capillary-wick claim should be checked against this older IC-cooling art before assuming a smartphone-specific angle is clear.
Explore the citation map in EurekaWatch the H01L/G06F overlap
A large share of filings tie thermal structures to specific chip layouts or system architectures rather than treating the vapor chamber as standalone. Designs that ignore this overlap risk missing blocking claims outside the obvious thermal-engineering classes.
Trace assignee overlap in EurekaReassess jurisdiction coverage
With US filings leading but China, Europe and WIPO/PCT each holding a meaningful share, a filing strategy built around a single office leaves significant exposure. Cross-check receiving-office spread against your target markets.
Compare receiving offices in EurekaCommon questions about this landscape
No, the data shows filing peaked in 2019 at 42 families and has declined since, down to roughly 11 by the 2022 midpoint and into single digits in the most recent tracked year. Because publication typically lags filing by about 18 months, the very last one to two years will always look thinner than the true rate, so the decline started before 2022 rather than at the data cut-off. Treat this as a maturing claim space rather than an emerging one, which affects both filing strategy and freedom-to-operate risk.
The most-cited records in this corpus are older heat-pipe and sintered-wick patents, including designs originally built for desktop and server integrated-circuit cooling rather than smartphones specifically. That means the foundational intellectual property in capillary wick structures predates the mobile thermal category and was not necessarily filed by companies now active in smartphone thermal solutions. Anyone designing a new wick structure should check these older records first, since citation volume reflects influence within this searched corpus, not current market activity.
Heat-exchange apparatus (F28D) and printed circuit assemblies (H05K) carry the largest record counts in this dataset, but semiconductor devices (H01L) and digital data processing (G06F) together account for over a hundred records as well. That overlap means a competitive review limited to classic thermal-engineering classes will miss claims that tie a vapor chamber's design to a specific chip layout or system architecture. A thorough clearance search should span all four clusters, not just F28D and H05K.
Powder-metallurgy approaches to wick fabrication and general metal-working assembly methods appear far less frequently in this dataset than core casing and wick geometry claims, despite showing up in the IPC spread. Support-structure reinforcement inside ultra-thin casings, of the kind described in earlier isothermal vapor chamber filings, also shows relatively thin recent coverage. These are reasonable starting points for scouting new claim territory, though any first claim there still needs a freedom-to-operate check against the older, heavily-cited wick patents.
Recent-year momentum across the tracked assignees is low overall: the one assignee with any recorded latest-year filing shows just one filing, down 80% year-on-year, and several other previously active companies, spanning device OEMs, chipmakers and dedicated thermal suppliers, show zero filings in the latest tracked year. This pattern is consistent with the broader filing slowdown seen across the whole dataset rather than a single company pulling ahead. Co-assignee filings are also rare, with only six pairs recorded and one pairing between a components manufacturer and a thermal-technology specialist accounting for most of the shared activity.
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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.