Semiconductor Fab Material Handling Patents: Leaders & Trends 2026
- Filing activity has flattened, not grown. the peak year was 2020 at 9 filings, and the 2022 midpoint of 5 shows the field cooling rather than accelerating into 2026.
- Claim density sits overwhelmingly in semiconductor devices and conveying. H01L appears in 128 of 144 families and B65G in 77, meaning most filings anchor material-handling claims to device or wafer-process context rather than to standalone robotics.
- The most-cited prior art predates the current AMHS wave by two decades. the top-cited records are electro-chemical deposition systems from the late 1990s, a reminder that citation weight favours old foundational filings over recent overhead-transport work.
What this landscape covers
This landscape tracks patent families filed against automated material handling in semiconductor fabs: overhead transport vehicles, wafer transfer robots, front opening unified pod (FOUP) logistics, and the scheduling and cleanroom-compatibility claims layered on top of them. The search spans 2015 to mid-2026 and pulls from filings classified across H01L21 (semiconductor devices), B65G1 (conveying and storage), and B25J11 (manipulators), so it captures both device-adjacent claims and the mechanical handling art itself.
Because publication lags filing by roughly 18 months, the 2025-2026 counts in any trend chart are necessarily incomplete and should be read as a floor, not a ceiling, on actual filing activity.
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Filing trend and technology composition
Two views of the same 144-family dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim weight.
A flat-to-declining filing curve
Filings rose from a single record in 2017 to a peak of 9 in 2020, then eased back toward the 2022 midpoint of 5. There is no sustained upward trend into the most recent full years, though the last one or two years are undercounted due to publication lag.
Concentration in device and conveying classes
H01L (semiconductor devices) appears in 128 of 144 families and B65G (conveying and material handling) in 77, confirming that most claims are written against wafer-process or transport hardware rather than generic robotics. B25J (manipulators/robots) appears in only 10 families and G05B (control systems) in 11, suggesting the control-logic and manipulator-mechanism layers are comparatively thin relative to the hardware layer.
Shares are the percentage of the 144 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Automation for Semiconductor Fab Material Handling with Eureka
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Try EurekaThe most-cited prior art and a recent representative filing
US20240387219A1 — Automated material handling systems
An overhead transport vehicle for an Automated Material Handling System (AMHS) that reduces manual urgent lot rescues when the logistic algorithm controlling AMHS traffic cannot move a front opening unified pod (FOUP) from one tool to the next within the required q-time. The vehicle carries an indicator to help fab operators spot a lot in trouble, plus a backup power source for use during unexpected disruption.Filed by Taiwan Semiconductor Manufacturing Co., Ltd., dated 2024-11-21.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6136163A | Apparatus for electro-chemical deposition with thermal anneal chamber | 576 |
| 2 | US6258220B1 | Electro-chemical deposition system | 459 |
| 3 | US6267853B1 | Electro-chemical deposition system | 215 |
| 4 | WO2000032835A2 | Electro-chemical deposition system | 104 |
| 5 | US5988971A | Wafer transfer robot | 87 |
| 6 | US20030235486A1 | Automated material handling system for semiconductor manufacturing based on a combination of vertical carouse… | 72 |
| 7 | US20090142163A1 | Wafer position correction with a dual, side-by-side wafer transfer robot | 63 |
| 8 | US20060246690A1 | Electro-chemical deposition system | 44 |
| 9 | US7165927B2 | Automated material handling system for semiconductor manufacturing based on a combination of vertical carouse… | 44 |
| 10 | US6635157B2 | Electro-chemical deposition system | 43 |
Citation counts favour older filings simply because they have had longer to accumulate citations within the searched corpus; treat this table as a map of influential prior art, not of current filing activity.
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 read-throughs from the trend, the classification split and the citation table.
Activity has cooled since 2020
The filing curve peaked in 2020 and has not returned to that level. Combined with the six major assignees each showing 0 filings and -100% YoY momentum in the latest year, this points to a maturing, consolidating field rather than one still in a land-grab phase.
Device claims dominate over pure robotics
Nearly all filings touch H01L, the semiconductor device classification, while dedicated manipulator/robot claims under B25J are comparatively rare. New entrants writing pure mechanism or gripper claims face a thinner prior-art wall than those writing device-integrated transport claims.
Foundational art is two decades old
The five most-cited records are electro-chemical deposition and wafer transfer systems from the late 1990s, led by a filing cited 576 times. Recent overhead-transport and scheduling filings, including the 2024 representative record, have not yet had time to accumulate comparable citation counts.
US and Japan anchor the filing base
The United States receives more than twice as many filings as any other office, with Japan, Taiwan, China, WIPO/PCT and South Korea trailing behind. This mirrors where fab equipment makers and foundries have historically concentrated their IP strategy.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to automation for semiconductor fab material handling, with the prior art for and against each one.
Who holds the claim positions
Filing activity concentrates among a small group of equipment makers and foundries, with co-assignment patterns pointing to long-running engineering teams rather than new joint ventures.
Leading assignees have gone quiet recently
Every one of the most active assignees in this corpus, spanning foundries and equipment makers, shows zero filings in the latest tracked year and negative year-over-year momentum. That is consistent with the broader flat-to-declining trend rather than a single company pulling back.
Collaboration is limited and internal
Only three co-assignee pairs appear in the dataset, and the strongest pairings link a single equipment company to named individual inventors rather than to another corporate assignee. This suggests handling automation IP here is largely developed in-house rather than through joint filings.
Filing strategy is US-first with Asian follow-on
With 65 of roughly 131 counted office filings in the United States, assignees appear to prioritise US protection first, then extend selectively into Japan, Taiwan, China, South Korea and via PCT. Companies filing broadly across all six offices are signalling long-term commercial commitment to the technology.
| Assignee | Recent year | YoY |
|---|---|---|
| Taiwan Semiconductor Manufacturing Co., Ltd. (TSMC) | 0 | -100% |
| Applied Materials, Inc. | 0 | — |
| Brooks Automation, Inc. | 0 | — |
| Murata Machinery, Ltd. | 0 | — |
| Asyst Technologies, Inc. | 0 | — |
| Novellus Systems, Inc. | 0 | — |
| Rorze Corporation | 0 | — |
| Muratec Automation Co., Ltd. | 0 | — |
Where to take this analysis
The dataset points to a field with occupied core claim space and thinner coverage at the edges.
Map the control-logic gap
G05B and G06F together cover only 20 of 144 records, well below the hardware classifications. A freedom-to-operate check focused specifically on scheduling and traffic-control algorithms, rather than the transport hardware itself, is likely to surface less crowded prior art.
Explore control-layer filings in EurekaTrack the quiet leaders for reactivation
Six major assignees show zero filings in the latest year. A watch list on these entities, rather than on new entrants, is the more reliable way to catch the next wave of filings once publication catches up.
Set up assignee monitoring in EurekaRevisit citation leaders before filing near deposition systems
The corpus's most-cited records are electro-chemical deposition systems, not transport robots. Any new filing that touches deposition-adjacent handling should clear this older, heavily-cited art first.
Review cited prior art in EurekaCommon questions on this landscape
The dataset's most active assignees include major foundries and fab equipment makers, but all of the leading names show zero filings in the most recent tracked year. This does not necessarily mean these companies have stopped investing in the technology; it more likely reflects the roughly 18-month lag between filing and publication combined with a genuine slowdown from the 2020 peak. Anyone assessing competitive position should treat the current leaderboard as a record of past investment rather than a live signal of who is filing today.
Based on this corpus, filings peaked in 2020 at 9 records and had eased to 5 by the 2022 midpoint, with no clear recovery visible since. That points to a flat-to-declining trend rather than sustained growth, though the most recent one to two years are undercounted because of publication lag. A reasonable read is that the core claim space matured and consolidated after an early-2020s filing push.
Semiconductor devices (H01L) and conveying/material handling (B65G) dominate, appearing in 128 and 77 of 144 records respectively. Dedicated manipulator and robotics claims under B25J, and control-system claims under G05B, are comparatively rare. This means most patent protection is written around device-integrated transport rather than around standalone robotic mechanisms or scheduling algorithms, leaving those adjacent layers less densely covered.
US20240387219A1, filed by Taiwan Semiconductor Manufacturing Co., Ltd. in November 2024, describes an overhead transport vehicle for an AMHS that carries a trouble indicator and backup power source, and that helps fab operators intervene when the logistic algorithm cannot move a FOUP to the next tool within the required q-time. It is narrowly drawn to that combination of features rather than to overhead transport in general. Anyone designing an overhead transport vehicle without an onboard trouble indicator and backup power source, or using a different rescue-triggering mechanism, is working outside this specific claim scope, though a full claim chart review is the only reliable way to confirm freedom to operate.
Relative to the dense hardware and device-integration claims, control-logic areas such as dynamic FOUP rescue scheduling, particle-generation sensing at transfer joints, and cleanroom-compatible actuator sealing show noticeably thinner coverage in this corpus. These are areas where the mechanical transport art is well established but the software and materials layers on top of it are not yet heavily claimed. A first filing targeting one of these specific combinations, rather than transport hardware generally, is more likely to find open claim space.
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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.