Research Profiles

JP

"P" Keywords - 87 Result(s)

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[Piezoelectric device]

MEMS/Micromachines and Microfabrication Technology

 
 
 
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特徴・独自性
  • We are studying MEMS (Micro Electro Mechanical Systems) and related technologies, which are typically used for the input/output of information/communication devices, the safety of automobiles etc. Our representative topics include integrated sensors, piezoelectric devices, RF MEMS, micro energy devices and wafer-level packages. Our facilities are open-accessible and well equipped with a lot of tools for lithography, dry/wet etching, thin film deposition, wafer bonding, device mounting and evaluations, which can be operated by each researcher. Using these tools, a variety of MEMS are being prototyped. Also, new microfabrication tools are being developed by ourselves.
実用化イメージ

We are collaborating with many companies, from which visiting researchers are dispatched to our laboratory. We also accept companies which want to just use specific tools in our facilities. Consultation is always welcome.

Researchers

Graduate School of Engineering

Shuji Tanaka

[piezoelectric material]

Hands-On Access Fabrication Facility –Open Facility for MEMS and Semiconductor Prototyping–

 
 
 
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概要

We offer shared facility for the development of semiconductor prototypes equipped with 4-inch, 6-inch and some 8-inch wafer fabrication tools available on an hourly basis. Know-how accumulated at Tohoku University is available, and staff provide maximum support for prototyping. The service is performed at the 1,200 m2 Super Clean Room on the second floor of the Junichi Nishizawa Memorial Research Centre at Tohoku University. For information on equipment and fees, see our website.

従来技術との比較

More than 10 experienced technical staff assist customer's usages. Standard process conditions for each process, such as etching and deposition, are provided. allowing customers to start prototyping immediately. Various materials other than silicon can also be supported.

特徴・独自性
  • We support the development of devices and semiconductor materials such as MEMS, optical elements and RF components.
  • Technical consultation on devices and processes before and during prototyping is also available.
  • A
  • 'Prototype lab' for device packaging is also available.
  • The museums where you can learn about the history of semiconductors, measuring instruments and sensors are open.
  • As part of Technology Co-creation for Semiconductor of Tohoku University, we promote R&D of semiconductors and the development of human resources.
  • On-demand semiconductor human resource development programs for students and engineers are available.
  • As a member of the MEXT's Advanced Research Infrastructure for Materials (ARIM) program, we are involved in sharing facility and data.
実用化イメージ

More than 330 companies have used our shared facility since its launch in 2010, not only from device manufacturers such as MEMS, but also from manufacturers of materials, mechanical components and equipment. To date, we have successfully supported the commercialization of about 10 devices.

Researchers

Micro System Integration Center

Kentaro Totsu

[piezoelectric sensors]

Development of Novel Scintillator and Piezoelectric Crystals

 
 
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特徴・独自性
  • Our research target is mainly focused on the topic of development of novel scintillator crystals, piezoelectric crystals, growth technology, characterization and its device application.
  • We design and synthesize new materials from a view point of Crystal Chemistry, and investigate their structure and physical properties. We also study on photo-detector, as suitable photo-detector fully contribute to get maximum signal from scintillator. This activity is very important to realize practical application of our developed materials. Recently, piezoelectric material and high melting temperature alloy project is also started.
実用化イメージ

For the purpose of "real" contribution to human culture, we are always carrying out our research activity considering the industrial application. This point is unique feature of our attitude toward science.

Researchers

Institute for Materials Research

Akira Yoshikawa

[Pig]

Development of Immunobiotic Evaluation System for Functional Feeds as a Livestock Animal Model

 
 
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特徴・独自性
  • Pattern recognition receptor (PRR) family plays an important role in the defense through recognition of pathogen-associated molecular patterns or microorganisms-associated molecular patterns (PAMPs/MAMPs).
  • Some functional feed materials are thought to regulate intestinal immunity by contact and stimulation of epithelial cells and immunocompetent cells via PRRs in the gastrointestinal tract and induction of cytokine production. In this "new world" of feed immunology, however, much remains unknown about the underlying mechanisms of intestinal immunity because of lack of appropriate intestinal immunoassay system for livestock animals.
  • We have advanced application of originally established porcine and bovine intestinal epitheliocytes (PIE, BIE) cell lines (see photo) for evaluation of immunobiotics and immunogenics exerting anti-inflammatory responses both in PIE cell monolayer and co-culture system with porcine peyer's patch immune cells as a peyer's patch culture model (see illustration).
実用化イメージ

This evaluation system may also contribute to elucidate immunoregulatory mechanism of immunobiotics and immunogenics mediated by pattern recognition receptors essential to future development of not only immunobiotic feeds but also vaccines using immunobiotics to prevent specific diseases. This can benefit mankind by offering immunobiotic feeds as a safer alternative to conventional antibiotic drug therapy.

Researchers

Graduate School of Agricultural Science

Haruki Kitazawa

[Pigment]

Colorful titanium oxide pigments without transition metals

概要

Colorful TiO2 Particle
https://www.t-technoarch.co.jp/data/anken_en/T19-849.pdf

従来技術との比較

Transition metal compounds are known to exhibit a wide variety of colors. Until now, it has been possible to color white titanium oxide by doping with transition metal ions, but it is difficult to avoid biotoxicity derived from transition metals.

特徴・独自性
  • In the present invention, titanium oxide inorganic pigments that do not contain transition metals and have various colors such as white, yellow, red, gray, green, purple, black, and skin color have been realized.
実用化イメージ

New applications of titanium oxide pigments are expected in the cosmetics field, where biotoxicity is an issue.

Researchers

Institute of Multidisciplinary Research for Advanced Materials

Yin Shu

[Pilot Sheds]

Evaluating the Effects and Social Implementation of Community Sheds

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概要

To prevent loneliness and social isolation in middle-aged and older adults, this study aims to introduce the community-based initiative “Community Shed.” This initiative has been selected for the project-driven track of Tohoku University’s co-creation promotion project, “SOKAP-Connect Projects.” Community Sheds are originated in Australia, into Japan and to scientifically examine its effects. As the number of older adults living alone increases and more people lose a sense of purpose in life, Community Sheds are attracting attention as places that foster social connections and promote the formation of ikigai (a sense of meaning in life). This study is grounded in the theory of the “Social Cure,” which posits that group membership enhances health and well-being.

従来技術との比較

Conventional interventions have been effective in addressing objective indicators of social isolation but have shown only limited impact in alleviating subjective feelings of loneliness, and they have insufficiently addressed the social structures that generate isolation. In Japan in particular, the isolation of older men after retirement has become a serious issue, with few opportunities available for creating new purposes in life or for seeking consultation. Community Sheds aim not merely to provide opportunities for social interaction but to focus on the quality of social connections and the construction of social identity (a sense of belonging). They are designed to offer a space for autonomous and self-directed activities through which participants can cultivate both a sense of purpose and a sense of belonging.

特徴・独自性
  • In collaboration with the Japan Community Shed Association and JST-RISTEX, pilot Community Sheds have been established in Japan, including “Yorou-ya” and “Dandan-ya” in Mizukami Village, Kumamoto Prefecture, and “Pokke-Kotan” in Nishi Ward, Sapporo City, where their effectiveness is being evaluated. The results so far indicate reductions in feelings of loneliness, improvements in perceived physical health and cognitive function, and an expansion of group memberships and supportive relationships. Building on these findings, this project aims to develop a sustainable, Japan-specific system to prevent unwanted isolation and loneliness.
実用化イメージ

In collaboration with companies, there is strong potential for joint demonstration projects and service development in areas such as corporate health management, community engagement, and the promotion of well-being. For example, applications may include second-career support programs for retired employees, initiatives to extend healthy life expectancy, and integration with community-based CSR activities. In this way, Community Sheds can be developed as a model that simultaneously addresses societal challenges and enhances corporate value.

Researchers

Graduate School of Education

Ayahito Ito

[Pistons]

Development of a Numerical Prediction System for Sliding Part Wear and Seizure Occurrence Portions

 
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概要

Focusing on the lubricant film flow with phase change between the engine piston pin and connecting rod small end, we developed a new multiphase fluid-structure coupled analysis method that takes into account elastic deformation of the structure and flow path changes and developed a simulation prediction method for tribological properties under high load conditions. The simulation prediction method for tribological properties under high load conditions has been created. As a result, we succeeded in simulation prediction of the wear/seizure generating areas in sliding parts. We discovered that the peculiar deformation behavior of the components is the cause of wear/seizure.

従来技術との比較

It has been thought that computational prediction is impossible to verify the wear and seizure locations in fluid lubrication. Still, this study succeeded in the simulation prediction of wear and seizure locations in sliding parts.

特徴・独自性
  • Numerical prediction of the wear and seizure locations in the sliding parts of engine piston pins was successfully performed.
  • The bow-like deformation of the piston pin was identified as the cause of mechanical contact and seizure at the connecting rod edge.
  • A three-dimensional multiphase fluid-structure coupled analysis method has been successfully developed, considering the piston pin's elastic deformation and connecting rod and thin-film cavitation1 lubrication with unsteady flow path changes.
実用化イメージ

This research method applies to automotive engines and all sliding component elements using fluid lubrication. It contributes to damage prediction and the development of safety guidelines for transportation and industrial machinery components, enabling the optimal design of components.

Researchers

Institute of Fluid Science

Jun Ishimoto

[plant]

Improvement of Seed Production by Using Reproductive Trait in Crops, Especially, Rice and Cruciferous Crops

 
 
 
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概要

The recent spate of extreme weather events is threatening to reduce crop seed and fruit production. We have identified a catalog of genes that respond under low and high temperature stress, and will construct a system that enables production under temperature stress through genome editing and other methods.

従来技術との比較

In addition to conventionally used genetic recombination methods, genome editing technology has made it possible to modify genes that can be used for practical purposes.

特徴・独自性
  • Crops are important for food, environment recovery, energy production, and amenity activity for human being. For improvement of crop seed production, the breeding of crops having environmental stress, is important. Especially the developmental stage from pollination to fertilization is quite weak for these environmental stresses. Thus, by breeding of reproductive trait, we will establish the high productivity and quality of crop seeds. From our research, we found several stress-tolerant genes. We already started the research by both basic and applied level.
実用化イメージ

For application, we evaluated by taking prize for application in 2001. And our basic data has been published in international Journal, "Nature" and "Science". If anyone is interested in these genes, we hope to conduct to collaborative research for establishing the useful breeding lines.

Researchers

Graduate School of Life Sciences

Masao Watanabe

[plasma agri]

Development of Nano-Medical-Agricultural Applied Technology Using Ion-Controlled Plasma

 
 
 
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特徴・独自性
  • Since we have developed the techniques (ion control plasma) to generate and control ions, electrons, reactive species (radicals) in the low temperature non-equilibrium plasmas which I can touch by hand, the composite materials using nanoparticles, nanocarbons, biological molecules are synthesized in the nano-electronics field, the minimally-invasive and highly-efficient drug/gene transfection systems are developed in the medical field, and bacteria and insects are killed by the plasma in place of pesticide in the agricultural field.
実用化イメージ

The ion-controlled plasmas are applied for the minimally-invasive gene transfection system, next-generation agricultural system, the electrode material of highly-efficient battery, and so on. We hope to conduct the collaborative research with a willing company for a practical application of the novel plasma nano-medical-agricultural applied technology in industry.

Researchers

Graduate School of Engineering

Toshiro Kaneko

[Plastic Deformation Capacity]

[plastic waste]

Developing plastic waste sorter using Terahertz waves and social implementation of sustainable recycling technology

 
 
 
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概要

This research utilizes the characteristics of terahertz waves, used in next-generation communications and autonomous driving, to identify the materials of plastic waste. It improves existing recycling technologies and can be applied to evaluate the quality of recycled plastics, ensuring stable production of high-quality recycled plastics. It enables easy development of devices to solve various issues in containers and packaging and automobile recycling, contributing to the realization of decarbonization and a circular economy.

従来技術との比較

Conventional plastic waste identification and sorting technologies use specific gravity sorting or near-infrared devices. Particularly, near-infrared sorting technology has accumulated an enormous amount of data and serves as the primary sorting technology in plastic recycling plants. However, near-infrared devices struggle with identifying black plastics, additives, and degradation. This technology uses terahertz waves to measure and evaluate transmission and absorption characteristics, allowing for identification of black plastics, additives, and degradation.

特徴・独自性
  • In recent years, there has been increasing global attention on plastic waste issues, such as marine pollution from drifting garbage and microplastics, the overseas export of plastic waste resources, and the increase in disposable containers like plastic bags and straws, especially due to the impact of COVID-19. There is growing demand for advanced identification and recycling of plastic waste materials, especially in the context of achieving the Sustainable Development Goals (SDGs) and realizing a circular economy.
  • The research group from Tohoku University, Shibaura Institute of Technology, and Shizuoka University has conducted research on the commercialization of advanced sorting devices for plastic packaging waste. We have successfully identified mixed plastics containing black plastics, additives, and flame retardants, which were difficult to identify with existing devices, by utilizing the characteristics of terahertz waves. We have also confirmed the ability of terahertz waves in assessing degradation caused by UV or long-term use. Furthermore, the method has been shown to be effective for distinguishing bioplastics, which is expected to see increasing demand in the future, in addition to plastic waste from container packaging, automobiles, and home appliances.
  • These identification technologies can be applied to properly sort plastic waste generated by the “The Plastic Resource Circulation Act,” enacted in 2022, contributing greatly to securing high-quality recycled resources through plastic waste resource recycling.
  • Our research group conducts interdisciplinary research with experts in various fields: social engineering, resource circulation (Professor Jeongsoo YU), optical engineering (Professor Tadao TANABE of Shibaura Institute of Technology and Professor Tetsuo SASAKI of Shizuoka University), information science and big data analysis (Associate Professor Kazuaki OKUBO), data collection and analysis, international cooperation (Specially Appointed Lecturer Gaku MANAGO), social experiments, and behavioral economics (Assistant Professor Xiaoyue LIU). We address the needs from social, economic, and environmental issues both domestically and internationally, working from diverse perspectives to solve challenges and contribute to the creation of a sustainable society. Collaboration and networking with private companies, government agencies, research institutions, and civic organizations are also expected.
実用化イメージ

This technology can be applied to the development of plastic waste identification and sorting devices from processes such as containers and packaging recycling, automobile recycling, and home appliance recycling, as well as the production and quality evaluation of recycled plastics.

Researchers

Graduate School of International Cultural Studies

Jeongsoo Yu

[Polarization Control Technology]

Development of the high-quality and low-power display system for ultra-realistic communications

 
 
 
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特徴・独自性
  • Recently, with a spread of high definition video streaming services and ubiquitous network, development of high-quality, ultra-realistic and low-power display systems has been demanded. We have been studying physical properties of liquid crystal materials, precise control technique of polarization, high performance liquid crystal display (LCD) devices and its application to the advanced display systems for the realization of new media such as electric paper display and digital signage display, and low-energy society. We established a polarization control technology which realizes a precise control of polarization with liquid crystal materials. By using this world-leading technology, we have been studying the control of the surface alignment of liquid crystal molecules and developed a wide-viewing angle and fast switching liquid crystal display, ultra-high definition field-sequential-color display (Fig. 1), ultra-low power reflective full-color display (Fig. 2) and large-size high-quality display system.
  • We are also studying the ultra-realistic display systems such as a spatial 3D display and a multiple directional viewing display based on the precise light control technique as a next generation interactive communication technologies (Fig.3). We hope to conduct collaborative research with a willing company for a practical application of this technology in industry.
実用化イメージ

Researchers

Graduate School of Engineering

Takahiro Ishinabe

[Policy Evaluation]

Scientific Evaluation and Implementation of Social Policies Based on Econometric Methods

概要

Evaluating the effectiveness of social policies and business strategies through rigorous scientific methods—and improving them based on empirical evidence—is a pressing challenge across the public sector, private enterprises, and local communities. In Japan, the promotion of Evidence-Based Policy Making (EBPM) has recently gained attention; however, its practice remains largely confined to traditional administrative data, while the diverse and rich resources held by corporations and local communities remain underutilized. Building mechanisms that enable collaboration among public, private, and academic sectors is essential for sharing knowledge that contributes to solving societal challenges.

This research employs econometric methodologies to assess the causal impacts of policies and programs implemented by governments and corporations, linking the findings to real-world applications. By integrating administrative records with diverse private-sector data—including consumption, labor, education, and health—this study seeks to generate robust evidence and contribute to the advancement of evidence-based policy and strategy formulation.

従来技術との比較

Conventional policy evaluations and social surveys have often relied on descriptive statistics and case studies, which have limited capacity to identify generalizable causal relationships. Likewise, corporate initiatives have only rarely been subject to systematic and rigorous impact evaluation. This research employs econometric causal inference methods—such as regression discontinuity design, instrumental variables, and event studies—and applies them to both large-scale administrative data and non-traditional (“alternative”) data. Compared with conventional correlation-based analyses, this approach enables more robust and practically relevant evaluations of causal effects.

特徴・独自性
  • Diverse Data Integration: Integrates administrative, corporate, and community data—regardless of type or continuity—to comprehensively evaluate policy and program impacts.
  • Rigorous Causal Inference: Applies advanced econometric methods, such as regression discontinuity design and instrumental variables, to provide evidence that goes beyond simple correlations.
  • Cross-Sectoral Applicability: Offers applicability across education, labor, welfare, urban policy, and consumer behavior.
  • Social Implementation: Directly links research outcomes to policy improvement and corporate strategy design, fostering implementation through industry–government–academia collaboration.
  • Capacity Building: Provides training in statistics and econometrics for municipal officials and corporate analysts, helping them build sustainable, data-driven decision-making cycles.
実用化イメージ

Public Sector: Provides scientific evidence for addressing educational inequality, designing welfare systems, labor market interventions, and urban environmental policies, thereby supporting the effective allocation of public resources.
Private Sector: Evaluates employee welfare programs, health management, workplace reforms, and reskilling initiatives, offering insights for sustainable and competitive strategic planning.
Society as a Whole: Builds sustainable and efficient social systems by integrating data and knowledge across governments, firms, and academic institutions.

Researchers

Graduate School of Economics and Management

Yuta Kuroda

[Policy recommendations]

Consumer evaluation of the binding nature of terms and conditions in online transactions.

概要

In light of the increase in online transactions since the onset of the pandemic, this study examines how consumers' tendency to agree to terms and conditions without reading them in detail affects
consumers' perception of binding force of fine print contracts. Building on previous research in the United States, we conducted an online experiment targeting Japanese consumers and analysed their responses to different virtual scenarios involving financial products and sports clubs, including fraudulent conditions.

従来技術との比較

Unlike previous studies, which focused on face-to-face transactions, this study examines online transactions in Japan. It takes a unique approach by investigating the impact of website explanations, the stepwise effect of consumers' purchase behavior, and the effect of different transaction targets, such as financial products and sports clubs.

特徴・独自性
  • The following findings were obtained from the online experiment.
  • (1) In online transactions, the presence of terms and conditions makes consumers strongly aware of their binding nature. Even if the terms and conditions contain unfair contents, consumers believe that they have 'agreed' to them and are bound by them simply by virtue of their existence and the act of clicking or tapping on them.
  • (2) The effect of explanations on websites in strengthening the binding force of terms and conditions is limited.
  • (3) The evaluation of the binding nature of terms and conditions by consumers varies depending on the type of transaction, e.g. financial products versus sports club memberships. In everyday sports club transactions, consumers tend to evaluate unfair conditions more strictly.
実用化イメージ

The results of this study suggest two practical measures for creating a fair trading environment: policy formulation and legal reform.
(1) Consumer protection laws and cancellation rules must be strengthened to prevent unfair trading practices.
(2) Since the impact of binding rules varies depending on the type of goods and services, it is necessary to formulate sector-specific policies.

Researchers

Graduate School of Law

Hatsuru Morita

[pollination reaction]

Improvement of Seed Production by Using Reproductive Trait in Crops, Especially, Rice and Cruciferous Crops

 
 
 
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概要

The recent spate of extreme weather events is threatening to reduce crop seed and fruit production. We have identified a catalog of genes that respond under low and high temperature stress, and will construct a system that enables production under temperature stress through genome editing and other methods.

従来技術との比較

In addition to conventionally used genetic recombination methods, genome editing technology has made it possible to modify genes that can be used for practical purposes.

特徴・独自性
  • Crops are important for food, environment recovery, energy production, and amenity activity for human being. For improvement of crop seed production, the breeding of crops having environmental stress, is important. Especially the developmental stage from pollination to fertilization is quite weak for these environmental stresses. Thus, by breeding of reproductive trait, we will establish the high productivity and quality of crop seeds. From our research, we found several stress-tolerant genes. We already started the research by both basic and applied level.
実用化イメージ

For application, we evaluated by taking prize for application in 2001. And our basic data has been published in international Journal, "Nature" and "Science". If anyone is interested in these genes, we hope to conduct to collaborative research for establishing the useful breeding lines.

Researchers

Graduate School of Life Sciences

Masao Watanabe

[Polyarteritis nodosa]

Development of McH-lpr/lpr-RA1 mouse, a study model that spontaneously develops severe autoimmune arthritis, vasculitis, and sialadenitis

 
 
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特徴・独自性
  • McH/lpr-RA1 mice are recombinant congenic mice descended from MRL/lpr and C3H/lpr mice and develop arthritis, vasculitis, and sialadenitis with high frequency and severity, with severe pannus formation similar to rheumatoid arthritis, polyarteritis nodosa, and Sjogren's syndrome. On the other hand, McH/lpr-RA1 mice do not develop systemic lymphadenopathy and severe nephritis as seen in MRL/lpr mice, so they are easy to breed and maintain and can be used for long-term drug administration experiments.
実用化イメージ

Development of diagnostic and therapeutic agents for collagen diseases. It can be applied to the elucidation of the mechanism of onset of immunological adverse events caused by immune checkpoint inhibitors and the development of drugs to prevent the onset of such events, etc. Industry-academia collaboration with pharmaceutical companies, test reagent companies, etc. is possible.

Researchers

Graduate School of Biomedical Engineering

Tetsuya Kodama

[Polymer]

Development of Nano-Interface Chemistry for Materials Sciences Using Surface Forces Measurement

 
 
 
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特徴・独自性
  • Our research aims at developing methods, including instrumentation, for characterizing surface (or interface) at the nano-meter level. Most of our research subjects are related to the surface forces measurement, which can directly monitor the interaction between two surfaces. We study phenomena occurring at the solid-liquid interface such as adsorption and structuring of liquids. We have developed the resonance shear measurement which is a sensitive method for evaluating properties of confined liquid for nano-rheology and tribology. Twin-path surface forces apparatus we developed enabled us to study wide variety of samples such as metals, ceramics and plastics.
実用化イメージ

These methods are applicable for characterizing lubricants, nano-materials, paints, sealants, and cosmetics. We hope to conduct collaborative research with a willing company for a practical application of this technology in industry.

Researchers

New Industry Creation Hatchery Center

Kazue Kurihara

Bio-inspired engineering for energy and biological applications

 
 
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特徴・独自性
  • Our goal is "bio-inspired engineering" to create new functions that exhibit functions beyond the nature systems by learning from their superior functions and incorporating them into creating materials and devices. For example, the development of surface treatment and adhesives learned from mussels, the development of anti-biofouling substrates learned from pitcher plants, the design of non-platinum catalysts for highly active fuel cells (hydrogen, enzymes, microbes, etc.) learned from hemoglobin, and needle-type biosensors learned from biological needles.
実用化イメージ

Based on electrochemistry and polymer chemistry, I provide technologies and expertise in the energy, biotechnology, and electrical and electronic fields, including metal-air batteries, fuel cells, surface treatment, adhesion, biosensors, etc.

Researchers

Frontier Research Institute for Interdisciplinary Sciences

Hiroya Abe

[Polymer Electrolyte Membrane]

Quantum and Molecular Dynamic Simulations of Transport Phenomena in Fuel Cell

 
 
 
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特徴・独自性
  • It is necessary to grasp nanoscale transport phenomena of materials in polymer electrolyte fuel cell to improve its performance. In our laboratory, nanoscale transport phenomena are analyzed by large scale molecular dynamics simulations using a supercomputer system. As the present theme, the dependence of the materials or structures of polymer electrolyte membrane on the ability of proton transfer(Fig. 1), the ability of proton transfer or oxygen permeability of ionomer in catalyst layer(Fig. 2), and the mechanism of transport phenomena of a water droplet in a nano pore in gas diffusion layer or micro porous layer(Fig. 3), are analyzed in detail.
実用化イメージ

These research can be applied to the analysis of flow field in devices which have nanoscale structure, for instance, fabrication process of semiconductor, friction phenomena of such nanoscale devices or next generation batteries, as well as the field of fuel cell.

Researchers

Institute of Fluid Science

Takashi Tokumasu

[Polymer film]

Dry-Contact Ultrasonic Technique

 
 
 
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特徴・独自性
  • A new dry-contact technique for transduction of broadband, high-frequency ultrasound via a solid layer inserted between water and the sample, whereat the pressure of about 0.1 MPa is applied at the layer/sample interface by evacuating air between them, has been developed. Based on the technique, acoustic imaging of an electronic package is realized under the dry environment (Fig. 1). Typically, the polymer films are used as the intermediate layer for water protection of the sample, and by utilizing the acoustic resonance phenomenon among water, film and the sample, higher quality acoustic image of the testing sample than that for the water immersion case can be recorded without getting the sample wet (Fig. 2). Moreover, thin materials, e.g., polymer film (Fig. 3), etc. can be characterized by analyzing the acoustic resonance phenomenon among the three media. We hope to conduct collaborative research with a willing company for a practical application of this technology in industry.
実用化イメージ

Researchers

Graduate School of Engineering

Hironori Tohmyoh

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