Company patents

TAIYO YUDEN CO., LTD.

TAIYO YUDEN CO., LTD's patent strategy reveals a strong, yet volatile, focus on Capacitors, which represent 52.4% of its portfolio and saw a significant 65.3% growth in 2025, despite a -65.5% decline so far in 2026. While core areas like Magnets & Inductors and Cement & Ceramics are seeing declining patenting activity (YoY -8.0% and -27.6% in 2025, respectively), the company showed an emerging interest in Inorganic Devices (Thermoelectric, Piezo) with a remarkable 300.0% YoY growth in 2024, though this has since leveled off.

Patent Trend by Technology Area

Yearly patent publications since 2023

Product themes

Product-level themes inferred from filings since 2023, with category chips showing where each theme appears. Select a theme to filter the patents below.

614 US filings (since 2023) · 12 categories · 27 themes

Capacitor Packaging & Interconnection is up +71.4% YoY. Worth a look.
Multilayer Ceramic Capacitor Design

Focuses on the internal and external structural elements, material compositions (e.g., ceramic dielectrics, electrode metals), and manufacturing techniques used to create multilayer ceramic capacitors (MLCCs), including aspects like mechanical robustness and internal circuitry.

Capacitors
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318since 2023
+63.9%YoY
Advanced Functional Ceramics

Ceramic materials and components engineered for specific functional applications, such as electronics, energy storage, wear resistance, or high-temperature heating elements.

Cement & Ceramics
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305since 2023
+67.6%YoY
Capacitor Packaging & Interconnection

Focuses on the physical design, materials, and methods for packaging capacitors and integrating them onto circuit boards, including external electrode structures, conductive adhesives, and mounting techniques to ensure reliable electrical and mechanical connections.

Capacitors
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202since 2023
+71.4%YoY
High-Density Magnetic Component Integration

Techniques for designing and manufacturing compact, multi-functional magnetic components, such as inductors, transformers, and coils, often involving embedded structures, multilayer designs, or shared magnetic circuits to achieve higher power density or smaller form factors.

Magnets & Inductors
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168since 2023
-6.0%YoY
Solid Electrolytes for Capacitors

Explores the composition and integration of solid or gel-based electrolyte materials within various capacitor types, such as solid electrolytic capacitors and supercapacitors, to enhance performance, stability, and safety.

Capacitors
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125since 2023
+25.7%YoY
Advanced Magnetic Powder Materials

Development and processing of metal powders with specific magnetic properties, including soft magnetic alloys, permanent magnet materials, and insulated powders for electronic components, often involving precise control of particle size, morphology, and composition.

Magnets & InductorsPowder MetallurgyAlloys
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68since 2023
-21.7%YoY
Piezoelectric Transducers & Films

Focuses on the design, fabrication, and application of piezoelectric materials and devices for sensing, actuation, or wave generation, including material properties, single crystal growth, and protective layers.

Inorganic Devices (Thermoelectric, Piezo)
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45since 2023
-20.0%YoY
Integrated Filter Packaging

Methods and structures for encapsulating, interconnecting, and integrating impedance network components, particularly acoustic filters, into larger modules or systems.

Impedance Networks (Filters, Resonators)
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44since 2023
+14.3%YoY
Solid-State Battery Manufacturing

Process and equipment for producing solid-state battery cells, including solid electrolyte synthesis (sulfide/oxide/polymer), thin-film deposition, lamination, sintering, dry-electrode fabrication, and stacking under controlled atmosphere.

Batteries & Fuel Cells
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43since 2023
-47.4%YoY
Acoustic Wave RF Filters

Devices utilizing piezoelectric materials to generate and filter acoustic waves, often for radio frequency applications, including surface acoustic wave (SAW) and bulk acoustic wave (BAW) structures.

Impedance Networks (Filters, Resonators)
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40since 2023
+36.4%YoY
Advanced Electronic Packaging

Methods and structures for integrating and enclosing electronic components into compact, multi-functional modules, often involving embedded components, multi-layer substrates, and electromagnetic shielding for performance and miniaturization.

Printed Circuits & Electronic Assemblies
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39since 2023
-33.3%YoY
Battery Electrode Coating & Slurry

Slurry compositions and coating processes for battery electrodes, including binder/active-material slurries, surface coating layers, and electrode-to-foil adhesion for cathode and anode.

Batteries & Fuel Cells
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26since 2023
-25.0%YoY
Ceramic Matrix Composite Manufacturing

Methods and processes for fabricating ceramic matrix composites (CMCs), including preform creation, infiltration techniques, and densification to form complex shapes with enhanced properties.

Cement & Ceramics
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23since 2023
-60.0%YoY
Magnetic Actuation and Field Control Systems

Systems and devices that utilize controlled magnetic fields, often generated by electromagnets, to produce mechanical motion, precise positioning, or manipulate physical phenomena like plasma distribution.

Magnets & Inductors
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15since 2023
+66.7%YoY
Metal Matrix Composites & Hard Materials

Composite materials where a metallic matrix is reinforced with a second phase (e.g., ceramic particles, carbon nanotubes, diamond grains) to significantly enhance properties like hardness, wear resistance, stiffness, or strength, often used in cutting tools, wear parts, or structural applications.

Alloys
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9since 2023
-33.3%YoY
Advanced Biomarker Detection Assays

Methods and compositions for identifying, quantifying, or characterizing specific biological molecules (e.g., nucleic acids, proteins, metabolites, antibodies) or microbial species, often for diagnostic, prognostic, or quality control applications.

Material & Chemical Analysis
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6since 2023
+100.0%YoY
Impedance Matching Networks

Circuits designed to transform the impedance of a source to match the impedance of a load, maximizing power transfer or minimizing signal reflections, often involving inductors, capacitors, and transformers.

Impedance Networks (Filters, Resonators)
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6since 2023
0.0%YoY
Flexible and Printed Circuitry

Manufacturing processes and material compositions for creating electronic circuits on flexible or conformable substrates, enabling novel form factors, enhanced durability, and new applications beyond rigid PCBs.

Printed Circuits & Electronic Assemblies
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6since 2023
-50.0%YoY
Battery Pack Mechanical Designfiltered

Focuses on the structural integrity, housing, mounting, and physical integration of battery cells into robust and protected packs within electric vehicles, including manufacturing considerations.

Batteries & Fuel Cells
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5since 2023
0.0%YoY
Resistive & Phase Change Memory

Development of memory cells utilizing resistive switching or phase-change materials, including novel material compositions, multi-layered structures, and integration with selector devices like bipolar junction transistors, to achieve non-volatile storage.

Inorganic Devices (Thermoelectric, Piezo)Specialty Semiconductor Devices (Legacy)
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5since 2023
-50.0%YoY
Lithium Battery Anode Materials

Active anode materials and manufacturing techniques for rechargeable lithium-ion batteries, including silicon-carbon composites, graphite, lithium-metal anodes, and electrode coating processes that improve capacity, cycle life, and rate capability.

Batteries & Fuel Cells
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3since 2023
0.0%YoY
Perovskite Photovoltaic Devices

Fabrication methods and material engineering for halide perovskite-based photoelectronic devices, particularly solar cells, addressing challenges such as material synthesis, nanowire formation, and lead leakage mitigation.

Specialty Semiconductor Devices (Legacy)
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3since 2023
n/a
Battery Material Recovery

Processes and apparatus for disassembling spent batteries and recovering valuable materials (e.g., metals, electrolytes, plastics) through mechanical, chemical, or electrochemical methods for reuse or sustainable disposal.

Batteries & Fuel Cells
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2since 2023
+100.0%YoY
Wearable Physiological Sensing

Development of devices and methods for non-invasive or minimally invasive collection and analysis of physiological data, often from wearable sensors, to monitor health, activity, or specific conditions.

Medical Diagnostics & Surgery
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2since 2023
new
Tunable Capacitors for RF Applications

Describes capacitors designed with actively variable capacitance, often employing phase-change materials or mechanical actuation, for use in radio frequency (RF) components, reconfigurable intelligent surfaces, and other tunable electronic systems.

Capacitors
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1since 2023
n/a
Device Enclosure & Material Engineering

Methods and materials used to construct robust and protective enclosures for electronic devices, focusing on structural integrity, impact resistance, thermal dissipation, and specialized material properties for enhanced durability.

Printed Circuits & Electronic Assemblies
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1since 2023
n/a
Alloy Coatings & Surface Treatment

Methods and compositions for applying metallic or alloy layers to a substrate, or modifying the surface of an alloy, to impart specific functional properties such as corrosion resistance, wear resistance, electrical insulation, or improved adhesion, without altering the bulk properties significantly.

Alloys
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1since 2023
n/a

Patents

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