Company patents

TOKYO ELECTRON LIMITED

Tokyo Electron Limited's patent strategy reveals a strong, sustained focus on its core Semiconductor Manufacturing Process, which accounts for 52.8% of its portfolio and saw a 21.7% YoY growth in 2025, alongside an emerging emphasis on Photolithography (42.3% YoY growth in 2025) and Semiconductor Testing (45.7% YoY growth in 2025), indicating a strategic push into advanced semiconductor fabrication and quality control. Surprisingly, the company has significantly shifted away from Transistor & Device Structure and Integrated Circuit Layout & Arrangement, with both categories showing a 100.0% decline in patenting activity so far in 2026, suggesting a reprioritization of R&D efforts.

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.

4,498 US filings (since 2023) · 12 categories · 46 themes

Semiconductor Device Manufacturing Processes is up +35.9% YoY. Worth a look.
Advanced Etching & Patterning Control

Techniques for precise material removal, pattern shaping, and controlling etch selectivity or uniformity, often involving plasma, wet chemistry, or directed beams to achieve desired features on semiconductor substrates.

Semiconductor Manufacturing Process
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1,466since 2023
+31.9%YoY
Substrate Patterning & Processing

Methods and equipment for applying photoresist uniformly onto wafers, forming patterns through various exposure techniques (e.g., direct imaging, multi-exposure), and integrating patterned layers into semiconductor structures or packaging.

Photolithography
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1,306since 2023
+18.1%YoY
Wafer Handling and Process Environment Control

Systems and methods for automated substrate transport, precise positioning, temperature regulation, and chamber environment management to ensure process stability, uniformity, and yield in semiconductor manufacturing.

Semiconductor Manufacturing Process
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1,290since 2023
+16.8%YoY
Plasma Process Chamber Engineering

Design and control of plasma processing chambers, including heating, gas delivery, electrode configurations, and magnetic field control for uniform and efficient material processing in semiconductor manufacturing.

Electron / Ion Tubes & Discharge
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1,286since 2023
+7.2%YoY
RF Plasma Power Delivery

Systems and methods for delivering radio frequency (RF) power to plasma processing chambers, including impedance matching, pulse shaping, and feedback control for stable and efficient plasma generation.

Electron / Ion Tubes & Discharge
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914since 2023
+6.7%YoY
Semiconductor Device Manufacturing Processes

Techniques and methodologies for fabricating semiconductor devices, including etching, deposition, annealing, isolation, and doping steps, aimed at improving yield, performance, or enabling new structures.

Transistor & Device Structure
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739since 2023
+35.9%YoY
Conformal & Selective Film Deposition

Methods for depositing thin films with controlled conformality, thickness, and material properties, including selective deposition on specific areas, often using atomic layer deposition (ALD), chemical vapor deposition (CVD), or epitaxial growth.

Coating & Surface TreatmentSemiconductor Manufacturing Process
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465since 2023
+38.2%YoY
Precision Substrate and Wafer Cleaning

Specialized cleaning techniques and apparatus designed for removing microscopic contaminants, residues, or films from sensitive substrates, such as semiconductor wafers or flat panel displays, often involving chemical, mechanical, or plasma-based methods.

Cleaning Processes
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453since 2023
+2.1%YoY
Temporary Wafer Bonding & Debonding

Methods for temporarily attaching a wafer or substrate to a carrier for thinning, dicing, or other processing, followed by controlled debonding, often using light-sensitive resins, temporary adhesives, or roughened interfaces.

Semiconductor Manufacturing Process
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233since 2023
+39.4%YoY
Advanced Deposition Chamber Hardware

Design and engineering of specialized components within deposition systems, such as heaters, targets, susceptors, and chamber walls, to achieve precise control over process parameters like temperature, material flux, and plasma characteristics.

Coating & Surface Treatment
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232since 2023
+4.7%YoY
3D Die Stacking & Vertical Interconnects

Techniques for stacking multiple semiconductor dies or active layers vertically to achieve higher density and shorter interconnections, often utilizing through-silicon vias (TSVs) or other vertical conductive paths like through-hole electrodes.

Semiconductor Packaging & Encapsulation
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228since 2023
+44.0%YoY
Advanced Mask Technologies

Innovations in the design, materials, and manufacturing of lithography masks, including reflective masks, programmable masks, and defect mitigation strategies, to enable finer feature patterning and process control.

Photolithography
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140since 2023
+162.5%YoY
In-situ Coating Process Diagnostics

Methods and systems for real-time monitoring and control of coating processes or chamber cleaning, utilizing sensor data (e.g., thermal, pressure, optical) and predictive models to ensure quality and optimize efficiency.

Coating & Surface Treatment
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134since 2023
+2.3%YoY
Advanced Transistor Device Architectures

Structural innovations in individual transistors, such as fin-based field-effect transistors (FinFETs), 3D gate structures, or multi-layer active regions, aimed at improving performance or density.

Integrated Circuit Layout & Arrangement
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112since 2023
-26.7%YoY
Wafer Bonding & Stacked Device Inspection

Inspection and testing methods specifically designed for wafers before, during, or after bonding processes, including verification of bonding surfaces, alignment, and defect detection in multi-wafer or stacked die assemblies.

Semiconductor Testing
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110since 2023
+73.1%YoY
Ion Implantation Control & Metrology

Methods and apparatus for precise wafer positioning, ion beam uniformity, and dose monitoring during ion implantation processes in semiconductor device manufacturing.

Electron / Ion Tubes & Discharge
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109since 2023
+68.0%YoY
In-situ Process Monitoring

Techniques and systems for real-time or near-real-time measurement and adjustment of semiconductor manufacturing parameters (e.g., temperature, etch rate, ion beam uniformity) to ensure process quality and consistency.

Semiconductor Testing
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93since 2023
+28.6%YoY
Lithography Metrology & Inspection

Techniques and apparatus for measuring critical dimensions, overlay accuracy, defect detection, and surface topography in lithographic processes, often involving optical, laser, or charged particle beams.

Photolithography
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78since 2023
+245.5%YoY
Novel Memory Transistor Architectures

Design and operation of transistors optimized for memory applications, including floating body devices, ferroelectric FETs (FeFETs), vertical TFTs for 3D arrays, and charge-trapping memory cells.

Transistor & Device Structure
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68since 2023
+72.7%YoY
AM Process Monitoring & Control

Systems and methods for real-time sensing, modeling, and closed-loop control of additive manufacturing parameters to ensure part quality, consistency, and process efficiency. This includes thermal management, atmospheric regulation, and precise material deposition.

Industrial Control Systems
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59since 2023
+18.8%YoY
FinFET & Multigate Device Fabrication

Manufacturing processes and structural designs for transistors utilizing fin-shaped channels or multiple gates (e.g., FinFETs, Gate-All-Around FETs) to enhance gate control and reduce short-channel effects.

Transistor & Device Structure
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58since 2023
-22.2%YoY
Gate Stack & Dielectric Engineering

Advanced techniques for forming and optimizing gate dielectrics, work function layers, and other dielectric layers within transistor structures to improve performance, reliability, and scaling.

Transistor & Device Structure
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56since 2023
+100.0%YoY
Advanced Material Characterization

Techniques and systems for precisely measuring electrical or electromagnetic properties of materials or components, often involving specialized resonators, waveguides, or multi-range measurement systems to ensure accuracy.

Semiconductor Testing
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43since 2023
+6.2%YoY
Vacuum System & Chamber Evacuation

Techniques and apparatus for achieving and maintaining vacuum conditions within charged particle and plasma processing chambers, including pump control, vacuum degree monitoring, and chamber sealing.

Electron / Ion Tubes & Discharge
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42since 2023
-29.4%YoY
Automated Visual Inspection

Systems that employ imaging and image processing to automatically detect defects, verify states, or ensure quality control in manufactured goods, printed materials, or industrial processes.

Material & Chemical Analysis
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38since 2023
+77.8%YoY
Advanced Photoresist Materials

Development of novel chemical compositions for photoresists, including polymers, sensitizers, and crosslinking agents, to achieve improved lithographic performance such as resolution, sensitivity, line edge roughness, and etch resistance.

Photolithography
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38since 2023
+30.0%YoY
EUV Lithography Systems

Components, processes, and methods specifically designed for Extreme Ultraviolet (EUV) lithography, including light sources, reflective optics, masks, pellicles, and contamination control mechanisms.

Photolithography
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36since 2023
+220.0%YoY
Chemical Mechanical Planarization & Wet Surface Treatment

Processes involving chemical and mechanical forces to planarize surfaces (CMP) or wet chemical treatments for cleaning, etching, or material removal, often utilizing specialized compositions, nozzles, or fluid management systems.

Semiconductor Manufacturing Process
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36since 2023
-33.3%YoY
Integrated Circuit Interconnect & Layout Optimization

Techniques for designing and fabricating the conductive pathways (interconnects) and their contacts between different components within an integrated circuit, focusing on density, reliability, and performance.

Integrated Circuit Layout & Arrangement
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35since 2023
+11.1%YoY
Package Thermal Management

Integrated solutions for dissipating heat generated by high-density semiconductor devices within the package, including embedded cooling structures, cold plates, and optimized fluidic channels.

Semiconductor Manufacturing ProcessSemiconductor Packaging & Encapsulation
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35since 2023
-38.5%YoY
Optical & Image-based Metrology

Utilizing optical systems, cameras, and image processing algorithms for precise measurement of physical dimensions, alignment, defects, and features on semiconductor wafers or packages.

Semiconductor Testing
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33since 2023
+425.0%YoY
Backside Contact & Interconnects

Techniques for forming electrical contacts, vias, and interconnects to semiconductor devices, including advanced methods like contact-over-active-gate (COAG) and backside contacts for improved density and performance.

Transistor & Device Structure
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20since 2023
+50.0%YoY
Advanced Material Integration

Incorporation of novel semiconductor, dielectric, or metallic materials into transistor structures to achieve enhanced performance, new functionalities, or specific device characteristics.

Transistor & Device Structure
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20since 2023
+75.0%YoY
On-chip Test Structures

Integration of dedicated physical structures or built-in circuitry within semiconductor devices to enable characterization of process variations, material properties, electrical leakage, or device performance.

Semiconductor Testing
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13since 2023
+600.0%YoY
Cleaning Process Monitoring & Control

Integration of sensors, data processing, and control systems to assess the effectiveness of a cleaning process, detect contaminants, measure cleaning agent delivery, and optimize operational parameters for efficiency and thoroughness.

Cleaning Processes
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12since 2023
+150.0%YoY
Predictive Maintenance & Anomaly Detection

Utilizing sensor data, historical performance, and analytical models to anticipate equipment failures, diagnose faults, and estimate remaining useful life, thereby enabling proactive maintenance and reducing downtime.

Industrial Control Systems
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9since 2023
+500.0%YoY
Automated Additive Dispensing

Mechanisms for storing, dispensing, and monitoring the delivery of liquid or solid laundry additives (detergents, softeners) into the wash fluid, including diagnostics for ensuring correct operation.

Cleaning Processes
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6since 2023
+200.0%YoY
Video Enhancement & Object Tracking

Methods and systems for improving the quality of video streams, generating intermediate frames, or continuously locating and following objects within a sequence of images, even under occlusion.

Image Processing
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5since 2023
new
AI/ML for Industrial Process Optimization

Applying machine learning and artificial intelligence models to analyze industrial data, predict system behavior, and optimize control strategies for improved efficiency, quality, or environmental compliance in manufacturing and operations.

Industrial Control Systems
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5since 2023
-50.0%YoY
Remote & Wireless Industrial Control

Systems and methods enabling the monitoring, configuration, and operation of industrial equipment and processes from a distance, often utilizing wireless communication protocols and networked platforms for enhanced flexibility and access.

Industrial Control Systems
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4since 2023
0.0%YoY
Sensor and Component Surface Cleaning

Technologies for removing contaminants from critical surfaces of sensors, vehicle parts, or industrial components, often involving automated or semi-automated processes. This can include physical, acoustic, or fluid-based methods to maintain functionality.

Cleaning Processes
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3since 2023
n/a
Wear & Corrosion Resistant Coatings

Application of protective layers to improve the durability and longevity of components by enhancing resistance to wear, oxidation, or chemical degradation in demanding operational environments.

Coating & Surface Treatment
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2since 2023
new
Charged Particle Beam Optics

Techniques and devices for generating, shaping, focusing, and deflecting electron or ion beams, often involving multi-pole lenses, deflectors, and aberration correction for applications like microscopy or processing.

Electron / Ion Tubes & Discharge
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1since 2023
new
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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1since 2023
new
Generative AI for Images

Techniques utilizing deep learning models like Generative Adversarial Networks (GANs) or diffusion models to create new images, modify existing ones, or generate synthetic data based on various inputs or conditions.

Image Processing
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1since 2023
new
X-ray Tube Design & Cooling

Engineering solutions for X-ray tube components, including integrated cooling systems (e.g., oil circulation) and control mechanisms for tube voltage and current to ensure stable and safe operation.

Electron / Ion Tubes & Discharge
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1since 2023
n/a

Patents

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