Thin-Film Thermoelectric Generators 2026 — PatSnap Eureka
Thin-Film Thermoelectric Generator Technology Landscape 2026
TF-TEGs are converging with MEMS, CMOS, and flexible substrates to power the next generation of IoT sensors, wearables, and industrial monitoring. Explore the patent clusters, key assignees, and emerging directions shaping the field.
How Thin-Film TEGs Work — and Why They Matter Now
Thin-film thermoelectric generators exploit the Seebeck effect — the generation of a voltage in response to a temperature difference — through p-type and n-type semiconductor thin films connected electrically in series and thermally in parallel. Unlike bulk thermoelectric modules, TF-TEGs are fabricated using processes borrowed from microelectronics: sputtering, chemical vapor deposition, photolithography, and MEMS micromachining. This enables leg dimensions in the 150–300 µm range and device volumes in the 1–10 cm³ class.
Three dominant architectural paradigms have emerged in the patent landscape: (1) in-plane (lateral) heat flux designs, where the thermal gradient and film plane are parallel; (2) out-of-plane (cross-plane) designs, where heat flux is perpendicular to the substrate; and (3) 3D heterogeneously integrated designs combining silicon wafer stacking with through-silicon vias (TSVs). The field is undergoing a decisive shift toward MEMS/CMOS-compatible architectures, flexible substrates, and silicon-integrated 3D configurations.
Materials span classical bismuth telluride (Bi₂Te₃/Sb₂Te₃/Bi₂Se₃) alloy films, full Heusler alloys (Fe₂VAl), organic-inorganic hybrids, perovskite thin films, and emerging carbon nanotube-based nanostructured composites. The European Patent Office and WIPO databases both reflect growing international filings in this space, with Japan, China, and Italy leading activity in this dataset.
Filing Activity, Jurisdiction Distribution & Assignee Concentration
Data visualised from the PatSnap Eureka TF-TEG dataset spanning 1986–2026. All values reflect records retrieved in this targeted search.
TF-TEG Filing Activity by Innovation Era
Filing momentum has accelerated sharply since 2016, with the 2023–2026 frontier period showing the highest relative activity index in the dataset.
Patent Filings by Jurisdiction (Dataset Share)
Japan accounts for the largest share (~52%) of filings in this dataset, followed by China (~27%), with Italy, Germany, and Europe contributing specialist clusters.
Top Assignees by Filing Volume (Dataset)
Consorzio Delta Ti Research (~10) and GCE Institute (~9) lead the dataset; the broader field is distributed across many assignees with no single entity controlling multiple clusters.
TF-TEG Application Domain Distribution
IoT and wearable energy harvesting represents the largest thematic cluster; industrial waste heat and chip cooling are growing application areas in the most recent filings.
Four Core Innovation Clusters in the TF-TEG Patent Landscape
The dataset reveals four distinct architectural and material clusters, each with different maturity levels, assignee concentrations, and commercialisation trajectories.
Sputtered Bi₂Te₃-Family Thin-Film Arrays
The dominant historical approach uses magnetron sputtering to deposit bismuth telluride (Bi₂Te₃), antimony telluride (Sb₂Te₃), and bismuth selenide (Bi₂Se₃) p-type and n-type film pairs. High L/A ratio (>100 cm⁻¹) design principles allow µW–W power generation from small gradients (≥5°C), with device volumes of 1–10 cm³ delivering >1 V output. Battelle Memorial Institute's filings in this cluster span CN (2007), JP (2007, 2012), and HK (2013). A high-integration variant using femtosecond laser-machined shadow masks achieves individual arm dimensions of 150–300 µm, as disclosed by Beijing University of Aeronautics and Astronautics Hangzhou Innovation Institute.
L/A ratio >100 cm⁻¹ · ≥5°C ΔT · >1 V outputSilicon-Integrated 3D Out-of-Plane Flux Architectures
Consorzio Delta Ti Research (Italy) has developed a suite of patents covering planar silicon-integrated TEG architectures where polycrystalline semiconductor thin-film segments are defined on hillside slopes of silicon, with alternating p-/n-doped sections connected by hilltop and valley-bottom metal contacts. Through-silicon via (TSV) copper fill paths enable stacking of multiple iTEG dice in 3D heterogeneous integration mode. Internal voids are evacuated during packaging to reduce thermal bypass. These architectures are claimed to be compatible with front-end CMOS and BiCMOS processes. STMicroelectronics extends this paradigm with laser direct structuring (LDS) of thermoplastic encapsulants (EP, 2025).
CMOS-compatible · TSV copper fill · 3D heterogeneousFlexible and Organic/Hybrid Thin-Film Thermoelectrics
A growing sub-field targets conformable, lightweight TEG for wearable applications. Josho Gakuen University (JP, 2022) discloses an n-type poly(Ni-ethentetrathiolate) film with particle size ≤300 nm and power factor ≥25 µWm⁻¹K⁻² stable in air. The Nano and Advanced Materials Institute (CN, 2020) embeds Bi₂Te₃ semiconductor branches in flexible PDMS-BN polymer matrices, delivering 35 µW/cm² at a 40 mm module thickness with stable output over multiple bending cycles. ICEA Co., Ltd. (JP, 2020) explicitly targets "slight temperature differences existing around a person" for wearable power supply. No single assignee dominates this sub-field — representing a clear entry opportunity.
35 µW/cm² · ≤300 nm particle size · PDMS-BN matrixAlternative Materials and Nanostructured Approaches
Beyond bismuth telluride, the dataset reveals filings in several alternative material systems. Hitachi Metals (JP, 2023) claims a full Heusler alloy thermoelectric conversion module with segmented carrier-concentration gradients for wide-temperature-range operation without rare or toxic elements. Tokyo Institute of Technology (JP, 2019) discloses a cross-plane thin-film device using Fe₂VAl₁₋ₓTaₓ (n-type) and Fe₂V₁₋ₓTiₓGa (p-type) films. GCE Institute (JP, 2018–2023) files an extensive series on nanoscale work-function-difference electrode pairs with nanoparticle intermediate layers, enabling power generation from very small temperature differences. Nanocomp Technologies (JP, 2010) describes carbon-nanotube-based p/n element cores for high specific power density at elevated temperatures.
Heusler alloys · Fe₂VAl films · CNT cores · nanoparticle electrodesTop Patent Assignees: Filing Volume, Status & Jurisdiction
Landscape concentration is partial — Consorzio Delta Ti Research and GCE Institute dominate their respective niches, while the broader field remains distributed across many assignees.
| Assignee | Jurisdiction | Est. Filing Count | Portfolio Status | Primary Cluster |
|---|---|---|---|---|
| Consorzio Delta Ti Research | IT / JP / CN | ~10 | Mixed | Silicon-Integrated 3D Out-of-Plane |
| GCE Institute Co., Ltd. | JP | ~9 | Mostly Active | Nanoparticle Work-Function Electrodes |
| Battelle Memorial Institute | CN / HK / JP | ~5 | Mostly Inactive | Sputtered Bi₂Te₃ Arrays (High L/A) |
| Beijing Univ. Aeronautics HII | CN | 2 | Active | Femtosecond Laser Shadow Mask |
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GCE Institute's ~9 active JP patents on nanoparticle work-function electrodes represent a dense cluster requiring FTO assessment before committing to ultra-low-gradient harvesting architectures.
Six Emerging Directions in TF-TEG Innovation (2023–2026)
The most recent filings signal where the field is heading — from MEMS foundry engagement to substrate-free films and solar-TEG hybrid systems.
MEMS-TEG with Laser Direct Structuring (2025)
STMicroelectronics' EP filing (2025) discloses a MEMS-TEG built on thermoplastic substrates processed by LDS technique and integrated with a metal thermal via system, targeting mass-manufacturable embedded heating system applications. This signals semiconductor foundry engagement in TF-TEG commercialisation.
Thermal Lens Electrodes for Isothermal Field Engineering (2024)
Barken Energy LLC (JP, 2024) proposes metal-layer "cans" surrounding thermoelectric pellets to modify internal isothermal surface curvature, producing a non-linear increase in power output from the same temperature gradient — a novel electrode architecture not previously prominent in the landscape.
Substrate-Free Film-Based Thermoelectric Elements (2024)
Nikolay Iosad (DE, 2024) files for substrate-free thermoelectric elements with planar metal foil electrodes on both sides of a thermoelectric film — eliminating the substrate thermal resistance penalty that limits thin-film efficiency in conventional architectures.
TEG Integrated with Image Sensors (2024)
Sony Group Corporation's DE filing (2024) directly couples thermoelectric conversion layers to image sensor architectures, suggesting convergence of TEG technology with CMOS imaging for passive power generation in sensor nodes — a previously unexplored application domain in this landscape.
What the TF-TEG Patent Landscape Means for R&D Teams
CMOS/MEMS process compatibility is the defining competitive barrier. Consorzio Delta Ti Research and STMicroelectronics have staked IP positions on silicon-integrated out-of-plane architectures explicitly compatible with front-end CMOS fabrication. R&D teams targeting volume production must either license these architectures or develop alternative CMOS-compatible process flows. The PatSnap Analytics platform can map citation networks to identify licensing leverage points.
The bismuth telluride supply and toxicity constraint is generating alternative material momentum. Filings from Hitachi Metals (Heusler alloys), Tokyo Institute of Technology (Fe₂VAl films), Josho Gakuen University (organometallic polymers), and Nanocomp Technologies (carbon nanotubes) all explicitly cite Bi₂Te₃ scarcity or incompatibility with microelectronics manufacturing as motivation — signaling a durable IP opportunity in non-Bi₂Te₃ thin-film materials. The OECD's critical materials framework further reinforces this strategic direction.
Industrial and automotive waste-heat integration is shifting toward embedded, self-powered sensor nodes. SKF's bearing-integrated TEG (CN, 2014) and STMicroelectronics' MEMS-TEG (EP, 2025) both target condition monitoring as the primary use case, not grid-scale power. Product developers should design TF-TEG modules specifically around the power requirements of wireless sensor nodes — typically 1–100 µW — rather than pursuing general-purpose high-wattage output. Explore PatSnap's life sciences and industrial solutions for cross-domain sensor node applications.
Flexible/wearable TEG remains fragmented with low IP concentration. No single assignee dominates the flexible substrate sub-field in this dataset. This represents an entry opportunity for organisations capable of integrating flexible TEG with stretchable electronics, textiles, or skin-interfaced sensors. The PatSnap customer case studies include examples of how R&D teams have used patent landscape analysis to identify exactly these kinds of white-space opportunities.
Thin-Film Thermoelectric Generators — key questions answered
Thin-film thermoelectric generators (TF-TEGs) convert temperature gradients directly into electrical energy using semiconductor thin films deposited via microfabrication techniques, enabling devices far smaller and more integrable than bulk thermoelectric modules. They exploit the Seebeck effect through p-type and n-type semiconductor thin films connected electrically in series and thermally in parallel, fabricated using processes such as sputtering, chemical vapor deposition, photolithography, and MEMS micromachining.
Three dominant architectural paradigms emerge: (1) in-plane (lateral) heat flux designs, where thermal gradient and film plane are parallel; (2) out-of-plane (cross-plane) designs, where heat flux is perpendicular to the substrate; and (3) 3D heterogeneously integrated designs combining silicon wafer stacking with through-silicon vias (TSVs).
Materials span classical bismuth telluride (Bi₂Te₃/Sb₂Te₃/Bi₂Se₃) alloy films, full Heusler alloys (Fe₂VAl), organic-inorganic hybrids, perovskite thin films, and emerging carbon nanotube-based nanostructured composites.
The top assignees by filing volume in this dataset are Consorzio Delta Ti Research (IT/JP/CN, ~10 filings), GCE Institute Co., Ltd. (JP, ~9 filings), Battelle Memorial Institute (CN/HK/JP, ~5 filings), Beijing University of Aeronautics and Astronautics Hangzhou Innovation Institute (CN, 2 filings), TDK Corporation (JP, 2 filings), and Panasonic Corporation (JP, 2 filings). STMicroelectronics and Sony Group Corporation represent active recent filers.
Application domains include IoT and wearable electronics energy harvesting (targeting temperature differentials as small as 5°C), industrial waste heat recovery and automotive, solar and building-integrated combined heat and power (CHP), chip thermal management and electronics cooling, and image sensing and infrared detection.
The most recent filings (2023–2026) highlight: MEMS-TEG with laser direct structuring and smart packaging (STMicroelectronics, EP 2025); thermal lens electrodes for isothermal field engineering (Barken Energy, JP 2024); substrate-free film-based thermoelectric elements (Nikolay Iosad, DE 2024); TEG integrated with image sensors and optoelectronic systems (Sony Group Corporation, DE 2024); transient liquid-phase bonding for high-temperature stability (Harbin Institute of Technology Shenzhen, CN 2024); and solar-TEG hybrid systems with photothermal stabilization achieving 95% UV-near-infrared absorptivity (Chengdu Vocational and Technical College, CN 2025).
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References
- Thermoelectric Devices and Applications of the Same — Battelle Memorial Institute, 2007, CN
- Thermoelectric Devices and Their Uses — Battelle Memorial Institute, 2007, JP
- N-type Semiconductor Material for Flexible Thermoelectric Power Generation Element — Josho Gakuen University, 2022, JP
- Silicon Integrated Out-of-Plane Heat Flux Thermoelectric Generator — Consorzio Delta Ti Research, 2019, CN
- 3D Integrated Thermoelectric Generator Operating in Out-of-Plane Heat Flux Configuration — Consorzio Delta Ti Research, 2021, JP
- Integrated Thermoelectric Generator and Related Manufacturing Method — Consorzio Delta Ti Research, 2022, JP
- MEMS Thermoelectric Generator, Manufacturing Process, and Heating System — STMicroelectronics S.R.L., 2025, EP
- Method for Fabricating High-Integration-Density Thin-Film Thermoelectric Devices — Beijing University of Aeronautics and Astronautics HII, 2021, CN
- Thermoelectric Conversion Module — Hitachi Metals Corporation, 2023, JP
- Thermoelectric Conversion Device and Electronic Device — Tokyo Institute of Technology, 2019, JP
- Thermoelectric Power Generating Element, Manufacturing Method, and Image Sensor — Sony Group Corporation, 2024, DE
- Thermal Lens Electrodes in Thermoelectric Generators for Improved Performance — Barken Energy LLC, 2024, JP
- Thermoelectric Elements, Thermoelectric Modules, and Methods for Their Manufacture — Nikolay Iosad, 2024, DE
- Thermoelectric Power Generation Device Based on Transient Liquid-Phase Bonding — Harbin Institute of Technology Shenzhen, 2024, CN
- TEC Photothermal Stable Temperature-Difference Power Generation Device — Chengdu Vocational and Technical College, 2025, CN
- Thermoelectric Power Harvesting Bearing Assembly — SKF, 2014, CN
- Flexible Thermoelectric Generator and Manufacturing Method — Nano and Advanced Materials Institute, 2020, CN
- WIPO — World Intellectual Property Organization: Global Patent Database
- European Patent Office (EPO) — Espacenet Patent Search
- OECD — Critical Raw Materials and Supply Chain Analysis
- NIST — National Institute of Standards and Technology: MEMS and Nanofabrication
All data and statistics on this page are sourced from the references above and from PatSnap's proprietary innovation intelligence platform. This landscape is derived from a limited set of patent and literature records retrieved across targeted searches and represents a snapshot of innovation signals within this dataset only.
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