Thesis
2025
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
Atomic Layer Growth of Pt Films using Dimethyl(N,N-Dimethyl-3-Butene-1-Amine-N)Platinum and O3
| Paper on the deposition of ultra-thin Pt films by O3-ALD using Pt precursor DDAP | Minseok Kim, Taeseok Kim, Jihoon Jeon , Gwang Min Park , Sung-Chul Kim , Sung Ok Won , Ryosuke Harada , and Seong Keun Kim | Applied Surface Science |
| Jaehyeok Kim, Minji Kim, Inkyu Sohn, Jisang Yoo, Taehyun Kim, Chanju Lee, Yusuke Ohshima, Shinichi Kato, Tatsuya Nakazawa, and Hyungjun Kim | Surfaces and Interfaces | ||
| Highly active iridium oxide catalysts are well known as catalysts used in the oxygen evolution reaction in water electrolysis, but the reason for the high activity of iridium oxide catalysts has remained unknown until now due to the complex reactions occurring on the electrode surface with its hierarchical structure. In this report, the origin of this high activity has been elucidated. | Neha Thakur, Yadan Ren, Mukesh Kumar, Tomoki Uchiyama, Mitsuharu Fujita, Ikkei Arima, Minoru Ishida, Yingkai Wu, Yuta Tsuji, Hideto Imai, Masashi Matsumoto, Yu Zhuang, Kentaro Yamamoto, Toshiyuki Matsunaga, Koji Ohara, Mitsuhiro Matsumoto, Yuki Orikasa, Yoshiyuki Kuroda, Shigenori Mitsushima, and Yoshiharu Uchimoto | ACS Journal of American Chemical Society |
Surface Plasmon Resonance Induced Nucleation of Protein
| Study on protein crystallization reaction on Au nanostructures. | Tetsuo Okutsu, Taku Yasue, Miku Murakami, Asuka Ito, Tomohiko Sato, Ryoya Nakayama, Tomoka Takasuka, Yoshikiyo Hatakeyama, Soshi Shiraishi, Tatsuya Shoji, Yasuyuki Tsuboi, Yutaka Kasuya, Masahiro Ito, Katsuya Tenjitsu, Akihiro Takura, and Hiroaki Horiuchi | Advances in Organic Crystal Chemistry |
Systematic investigation of the properties of ordered B2 structure Ru-Al-Ni alloys
| Systematic characterization of Ru-Al-Ni heat-resistant alloys | Fumihiko Saito, Tatsuya Nakazawa and Shuichi Kubota | MRS Advances |
Scalable alloy-based sputtering of high-conductivity PdCoO2 for advanced interconnects
| Takayuki Harada, Zuin Ping Lily Ang, Yuki Sakakibara, Takuro Nagai, and Yasushi Masahiro | Applied Physics Letters | |
| A study investigating the thermal decomposition behavior and thermal decomposition energy of the Ru precursor TRuST in the gas phase using a mass spectrometer. | Ken Miyajima, Toshiaki Nagata, Fumitaka Mafuné, Tomohiro Tsugawa and Ryosuke Harada | Physical Chemistry Chemical Physics |
| Fabrication of RuSSe thin films using our Ru precursor and band gap control | Jaehyeok Kim, Hwi Yoon, Inkyu Sohn, Tatsuya Nakazawa, Sangyoon Lee, Donghyun Kim, Yusuke Ohshima, Hiroki Sato, Seunggi Seo, Sojeong Eom, Seung-Min Chung, and Hyungjun Kim | Rare Metals |
Role of NOx and Supported RuO2 in Accelerating Soot Oxidation over RuO2/CeO2-ZrO2
| When we investigated soot oxidation on a precious metal/CeO2-ZrO2 catalyst under NO2 flow, we found that only Ru oxide reduced the reaction temperature. However, the active oxygen species was not NOx species but the lattice oxygen of CeO2. We concluded that adsorbed NOx species promoted soot oxidation through redox. | Hitoshi Kubo, Yusuke Ohshima, Shunsuke Kato, Noriyuki Saitoh, Noriko Yoshizawa, Osamu Nakagoe, and Shuji Tanabe | Applied Catalysis A, General |
Tunable structural rearrangement in Cu cluster assemblies through linker and solvent alterations
| A new crystal consisting of an accumulation of particles called nanoclusters was synthesized, and its structure was analyzed and evaluated using single crystal XRD. | Saikat Das, Jin Sakai, Riki Nakatani, Ayumu Kondo, Rina Tomioka, Subhabrata Das, Shuntaro Takahashi, Tokuhisa Kawawaki, Sourav Biswas and Yuichi Negishi | Chemical Science |
2024
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
Effect of the Supported Metal Species on Soot Oxidation over PGM/CeO2-ZrO2
| Investigating soot oxidation on precious metal/CeO2-ZrO2 catalysts, we found that Ru, Rh, and Ir oxides reduced the reaction temperature. We confirmed that the active oxygen species was the lattice oxygen of CeO2, and that these metal species supplied oxygen to the support, making it easier to reduce the support. | Hitoshi Kubo, Yusuke Ohshima, Shunsuke Kato, Noriyuki Saitoh, Noriko Yoshizawa, Osamu Nakagoe, and Shuji Tanabe | Bulletin of the Chemical Society of Japan |
Metallic nanofilms on Si(100) and SiO2 grown with a ruthenium precursor
| Study on the initial film growth behavior on Si(100) and SiO2 surfaces using Ru precursor TRuST. | Leonid Bolotov, Yohei Kotsugi, Tomohiro Tsugawa, Shutaro Asanuma and Noriyuki Uchida | Japanese Journal of Applied Physics |
| A paper on substrate-selective deposition using ozone as a reactive gas for Ir precursor TICP. | Han Kim, Taeseok Kim, Hong Keun Chung, Jihoon Jeon, Sung-Chul Kim, Sung Ok Won, Ryosuke Harada, Tomohiro Tsugawa, Sangtae Kim, and Seong Keun Kim | Small |
| Bonding Steength Evaluation of Sub-Micron Au Particle Bumps for High Density Packaging | Yuichi makita, Akihito Fujino, and Kenichi Inoue | Journal of the Japan Institute of Electronics Packaging |
Recovery Technologies for Precious Metals
| This paper will discuss the current status and trends of precious metal recycling and the current issues surrounding the precious metal recycling process. | Akihiko Okuda | The Chemical Times |
| Pt nanoparticles were deposited on 2D WS₂ by ALD, resulting in enhanced photodetection sensitivity. | Dain Shin, Inkyu Sohn, Donghyun Kim, Jaehyeok Kim, Taewook Nam, Youngjun Kim, Jusang Park, Tatsuya Nakazawa, Seung-Min Chung, and Hyungjun Kim | Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films |
2023
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
| Gas sensor properties improved by ALD deposition of Pt nanoparticles on 2D WS2 | Dain Shin, Inkyu Sohn, Jaehyeok Kim, Tatsuya Nakazawa, Sangyoon Lee, Hwi Yoon, Jisang Yoo, Jusang Park, Seung-Min Chung, and Hyungjun Kim | ACS Applied Nano Materials |
| A bottomless barrier structure for via applications was investigated using area-selective ALD (AS-ALD) with TANAKA's Ru precursor TRuST and ZnO, enabling selective Ru deposition for advanced semiconductor interconnects. | Yuki Mori, Taehoon Cheon, Yohei Kotsugi, Youn-Hye Kim, Yejin Park, Mohd Zahid Ansari, Debananda Mohapatra, Yujin Jang, Jong-Seong Bae, Woobin Kwon, Gahui Kim, Young-Bae Park, Han-Bo-Ram Lee, Wooseok Song, and Soo-Hyun Kim | Small |
Trends in Precious Metal Recycling
| This paper will discuss the current status and trends of precious metal recycling and the current issues surrounding the precious metal recycling process. | Akihiko Okuda | Society of Environmental Resources Engineering |
Nucleation and Layer Closure Behavior of Iridium Films Grown by Atomic Layer Deposition
| Research on O2-ALD of Ir precursor TICP. It was revealed that the behavior in the early stages of film formation affects the roughness and continuity of the Ir film. | Hong Keun, Chung Han, Kim Jihoon, Jeon Sung-Chul, Kim Sung, Ok Won, Ryosuke Harada, Tomohiro Tsugawa, Yoon Jang Chung, Seung-Hyub Baek, Tae Joo, Park Seong, and Keun Kim | The Journal of Physical Chemistry Letters |
| Crystals composed of assembled nanoclusters were newly synthesized and exhibited photoluminescence (PL) properties. The PL intensity was found to decrease upon exposure to nitrobenzene, indicating potential sensing functionality. | Taishu Sekine, Jin Sakai, Yusuke Horita, Haruna Mabuchi, Tsukasa Irie, Sakiat Hossain, Tokuhisa Kawawaki, Subhabrata Das, Shuntaro Takahashi, Saikat Das, and Yuichi Negishi | Chemistry-A European Journal |
Sputter-grown c-axis-oriented PdCoO2 thin films
| T. Harada, T. Nagai, M. Oishi, and Y. Masahiro | Journal of Applied Physics | |
Silver Cluster-Assembled Materials for Label-Free DNA Detection
| Crystals composed of assembled nanoclusters were newly synthesized and evaluated as fluorescence quenchers to enhance sensitivity in DNA detection. | Saikat Das, Taishu Sekine, Haruna Mabuchi, Sakiat Hossain, Subhabrata Das, Shun Aoki, Shuntaro Takahashi and Yuichi Negishi | Chemical Communications |
2022
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
Recycling Precious Metals from Urban Mines to Make Medals
| The gold and silver medals for the Tokyo 2021 Olympic and Paralympic Games were produced using recycled precious metals sourced from urban mining, with the process spanning collection, refining, and plating technologies. | Tasuku Arimoto, Kozo Hayashi, and Takashi Hayashi | Journal of The Surface Finishing Society of Japan |
| A high-sensitivity rapid dengue diagnostic kit, TKK 1st/2nd, was developed and evaluated primarily using DENV-2 samples from Bangladesh. Further validation with other serotypes is required to improve overall diagnostic accuracy. | Kanaporn Poltep, Juthamas Phadungsombat, Nathamon Kosoltanapiwat, Borimas Hanboonkunupakarn, Witthawat Wiriyarat, Sarin Suwanpakdee, Phirom Prompiram, Emi E. Nakayama, Keita Suzuki, Hisahiko Iwamoto, Tatsuo Shioda, and Pornsawan Leaungwutiwong | Virology Journal |
Quantitative Two-Stage Classification of Gas Mixtures Using 2D TMDC and PGM Chalcogenides
| A gas mixture classification method using chemiresistive sensors based on 2D TMDCs and platinum-group chalcogenides achieved over 90% accuracy for NO₂, NH₃, and their mixtures. Combined with a two-stage data analysis model, the approach demonstrates strong potential for practical gas sensing applications in healthcare and industry. | Inkyu Sohn, Joungbin An, Dain Shin, Jaehyeok Kim, Tatsuya Nakazawa, and Yohei Kotsugi | IEEE Sensors Journal |
| Tomoyuki Fujinami | Materials Science Society of Japan | ||
Atomic Layer Deposited RuO2 Diffusion Barrier for Next Generation Ru-interconnects
| Atomic layer deposition (ALD) using TANAKA's Ru precursor TRuST enables high-quality Ru thin films tailored for semiconductor device applications. | Youn-Hye Kim, Minsu Kim, Yohei Kotsugi, Taehoon Cheon, Debananda Mohapatra, Yujin Jang, Jong-Seong Bae, Tae Eun Hong, Rahul Ramesh, Ki-Seok An, and Soo-Hyun Kim | Advanced Functional Materials |
| RuS₂ was fabricated using Ru atomic layer deposition followed by post-sulfurization, and its near-infrared photodetection performance was evaluated. | Tatsuya Nakazawa, Donghyun Kim, Jaehyeok Kim, Yohei Kotsugi, Taehoon Cheon, Seung-Min Chung, Soo-Hyun Kim, and Hyungjun Kim | Rare Metals |
Development of Precious Metals to Support Hydrogen and Digital Societies
| Processing technologies for palladium membranes used in hydrogen permeation and AuSn lids for quartz crystal oscillator package sealing are introduced. | Takao Asada, and Suichi Kubota | Bulletin of the JSTP |
Atomic Layer Deposition of Iridium Using a Tricarbonyl Cyclopropenyl Precursor and Oxygen
| Atomic layer deposition (ALD) using TANAKA's Ir precursor TICP enables high-quality Ir thin films for semiconductor applications as well as efficient catalysts for hydrogen evolution (HER) and oxygen evolution reactions (OER). | Na-Yeon Park, Minsu Kim, Youn-Hye Kim, Rahul Ramesh, Dip K. Nandi, Tomohiro Tsugawa, Toshiyuki Shigetomi, Kazuharu Suzuki, Ryosuke Harada, Miso Kim, Ki-Seok An, Bonggeun Shong, and Soo-Hyun Kim | ACS Chemistry of Materials |
2021
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
Photocurrent Enhancement of PtSe2 Photodetectors by Using Au Nanorods
| Near-infrared photodetection sensitivity of PtSe₂ was enhanced by coating with Au or Ag nanorods, demonstrating plasmon-assisted performance improvement. | Tatsuya Nakazawa, Donghyun Kim, Shinichi Kato, Jusang Park, Jwamin Nam and Hyungjun Kim | Photonics |
Dual-phase Au-Pt alloys free from magnetic susceptibility artifacts in magnetic resonance imaging
| A dual-phase Au-Pt alloy was developed to minimize MRI artifacts while maintaining high workability, enabling its use in medical devices requiring both MRI compatibility and reliable metal processing. | Ryusuke Nakai, Kenji Goto, Kunihiro Shima, Tomonobu Kodama, and Hiroo Iwata | Magnetic Resonance Imaging |
| A resurgence of Chikungunya virus (CHIKV) occurred in the Maldives in late 2018, with analysis of acute clinical features and viral genotypes identifying it as one of the largest and longest outbreaks recorded in the region. | Hisham Ahmed Imad, Juthamas Phadungsombat, Emi E. Nakayama, Keita Suzuki, Ahmed Mifthah Ibrahim, Aminath Afaa, Aminath Azeema, Aminath Nazfa, Aminath Yazfa, Anoosha Ahmed, Athifa Saeed, Azna Waheed, Fathimath Shareef, Mohamed Moinul Islam, Shausha Mohamed Anees, Sana Saleem, Aminath Aroosha, Ibrahim Afzal, Pornsawan Leaungwutiwong, Watcharapong Piyaphanee, Weerapong Phumratanaprapin, and Tatsuo Shioda | The American Journal of Tropical Medicine and Hygiene |
Synthesis and Application of AgBiS2 and Ag2S Nanoinks for the Production of IR Photodetectors
| Changes in device performance were evaluated as a function of processing methods for photodetector devices coated with AgBiS₂ and Ag₂S nanoparticles. | Tatsuya Nakazawa, Donghyun Kim, Yusuke Oshima, Hiroki Sato, Jusang Park, and Hyungjun Kim | ACS Omega |
Atomic Layer Deposition of Ru for Replacing Cu-Interconnects
| Atomic layer deposition (ALD) using TANAKA's Ru precursor TRuST enables high-quality Ru thin-film formation, supporting advanced applications in semiconductor device fabrication. | Yohei Kotsugi, Seung-Min Han, Youn-Hye Kim, Taehoon Cheon, Dip K. Nandi, Rahul Ramesh, Neung-Kyung Yu, Kirak Son, Tomohiro Tsugawa, Shigeyuki Ohtake, Ryosuke Harada, Young-Bae Park, Bonggeun Shong, and Soo-Hyun Kim | ACS Chemistry of Materials |
| Mechanical properties of Au-Cu-Al alloys were enhanced by introducing the DB19 martensite phase through compositional control. The resulting alloys showed significantly improved strength and ductility while maintaining optical reflectance comparable to pure gold. | Kang-Wei Goo, Wan-Ting Chiu, Ayano Toriyabe, Masahiro Homma, Akira Umise, Masaki Tahara, Kenji Goto, Takumi Sannomiya, and Hideki Hosoda | Materials |
Synthesis of acetic acid from CO２, CH3I and H2 using a water-soluble electron storage catalyst
| A new Rh complex catalyst enabled acetic acid synthesis using carbon dioxide as the carbon source under mild conditions, providing insight into the reaction mechanism and offering an alternative to conventional methanol-CO processes. | Takeshi Yatabe, Kazuki Kamitakahara, Kaede Higashijima, Tatsuya Ando, Takahiro Matsumoto, Ki-Seok Yoon, Takao Enomoto, and Seiji Ogo | Chemical Communications |
Effects of flow velocity on ignition characteristics of hydrogen recombination catalyst
| The potential risk of hydrogen explosions triggered by catalytic effects was investigated. The results showed that hydrogen can explode within its flammable concentration range when the temperature reaches 600 °C, highlighting important safety considerations. | Takahiro Tamba, Hitoshi Kubo, Shunsuke Kato, Yusuke Oshima, Takehiro Matsunaga, and Ken Okada | Science and Technology of Energetic Materials |
Post-Chikungunya Virus Infection Musculoskeletal Disorders: Syndromic Sequelae after an Outbreak
| Following the 2019 Chikungunya virus outbreak in Thailand, some patients developed chronic arthritis characterized by IgG positivity with negative antigen and IgM tests. Inflammation limited finger mobility and affected daily activities but improved with anti-inflammatory treatment. | Hisham A. Imad, Wasin Matsee, Sajikapon Kludkleeb, Punyisa Asawapaithulsert, Juthamas Phadungsombat, Emi E. Nakayama, Keita Suzuki, Pornsawan Leaungwutiwong, Watcharapong Piyaphanee, Weerapong Phumratanaprapin, and Tatsuo Shioda | Topical Medicine and Infections Disease |
| Acute Chikungunya virus (CHIKV) infections in Thailand in 2019 were analyzed using a new antigen test and PCR. Fever and joint pain were the main symptoms, with higher viral loads associated with joint pain, particularly large-joint involvement in female patients. | Hisham A. Imad D, Wasin Matsee, Sajikapon Kludkleeb, Punyisa Asawapaithulsert, Juthamas Phadungsombat, Emi E. Nakayama, Keita Suzuki, Pornsawan Leaungwutiwong, Watcharapong Piyaphanee, Weerapong Phumratanaprapin, and Tatsuo Shioda | Topical Medicine and Infections Disease |
2020
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
| Single-atom Pt catalysts were deposited by ALD using a novel Pt precursor, enabling efficient Pt utilization on high-surface-area supports. The resulting catalysts demonstrated strong hydrogen evolution reaction (HER) performance with minimal Pt loading. | Rahul Ramesh, Seungmin Han, Dip K. Nandi, Sandesh Y. Sawant, Deok Hyun Kim, Taehoon Cheon, Moo Hwan Cho, Ryosuke Harada, Toshiyuki Shigetomi, Kazuharu Suzuki, and Soo-Hyun Kim | ADVANCED MATERIALS INTERFACES |
Gold(I) Complexes of Hydantoin Derivatives and Their Properties
| A hydantoin-based Au(I) complex was synthesized and evaluated as a non-cyanide gold plating bath. The bath exhibited low residual chlorine, high stability and oxidation resistance in a neutral pH range, and produced yellow gold deposits with high current efficiency. | Haruko Sasaki | Journal of The Surface Finishing Society of Japan |
| A new monoclonal antibody was developed that detects all three Chikungunya virus (CHIKV) genotypes. Analysis revealed that reduced sensitivity in conventional rapid tests to the Asian genotype was caused by a single amino acid substitution in the E1 protein. | Keita Suzuki, Ralph Huits, Juthamas Phadungsombat, Aekkachai Tuekprakhon, Emi E. Nakayama, Riemsdijk van den Berg, Barbara Barbé, Lieselotte Cnops, Rummana Rahim, Abu Hasan, Hisahiko Iwamoto, Pornsawan Leaungwutiwong, Marjan van Esbroeck, Mizanur Rahman, and Tatsuo Shioda | Virology Journal |
2019
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
Direct Patternable Plating Process Replaces Metal-Ink Process
| Direct pattern plating technology is explained, highlighting its ability to form fine metal patterns without conventional lithography processes, enabling simplified fabrication and improved process efficiency. | Masahiro Ito | Journal of The Surface Finishing Society of Japan |
Evaluation of novel rapid detection kits for dengue virus NS1 antigen in Dhaka, Bangladesh, in 2017
| Dengue virus (DENV) infection is a global health concern, with secondary infections potentially leading to severe dengue hemorrhagic fever (DHF). Accurate diagnosis is critical for DHF risk prediction, driving demand for rapid diagnostic tests; however, current kits suffer from limited sensitivity and cross-reactivity with other flaviviruses such as Zika virus. | Keita Suzuki, Emi E. Nakayama, Akatsuki Saito, Akio Egawa, Tairyu Sato, Juthamas Phadungsombat, Rummana Rahim, Abu Hasan, Hisahiko Iwamoto, Mizanur Rahman, and Tatsuo Shioda | Virology Journal |
| Dengue viruses detected in Bangladesh during 2017-2018 comprised three serotypes and a newly emerging lineage, revealing increased genetic diversity distinct from previously dominant genotypes. | Keita Suzuki, Juthamas Phadungsombat, Emi E. Nakayama, Akatsuki Saito, Akio Egawa, Tairyu Sato, Rummana Rahim, Abu Hasan, Marco Yung-Cheng Lin, Tomohiko Takasaki, Mizanur Rahman, and Tatsuo Shioda | Infection, Genetics and Evolution |
| A Ni atomic layer deposition (ALD) process using a novel Ni precursor was developed, enabling selective Ni film growth on graphene defect sites. The formation of high-quality Ni thin films expands potential applications in semiconductor devices, catalysis, and two-dimensional materials. | Minsu Kim, Shunichi Nabeya, Dip K. Nandi, Kazuharu Suzuki, Hyun-Mi Kim, Seong-Yong Cho, Ki-Bum Kim, and Soo-Hyun Kim | ACS Omega |
| The mechanical deformation behavior and magnetic susceptibility of Au₂CuAl shape memory alloys were evaluated across a range of Cu compositions. Au₂CuAl exhibited stable compressive deformation and low magnetic susceptibility, indicating MRI artifact-free performance, while compositional changes influenced deformation stress and magnetic response. | Kenji Goto, Akira Umise, Masaki Tahara, and Hideki Hosoda | MATERIALS TRANSACTIONS |
2018
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
| A new rapid diagnostic kit capable of detecting adenovirus and respiratory syncytial virus (RSV) within 10 minutes was developed. Testing with PCR-positive samples demonstrated practical sensitivity levels, supporting its clinical applicability. | Thuy Phung, Huong Do, Hisahiko Iwamoto, Keita Suzuki, Dat Tran, and Kazuo Suzuki | ADC Letter for Infectious Disease Control |
| PdEr silicide was successfully formed on n-Si(100) using a PdEr alloy sputtering target, and its contact properties were evaluated for the first time. The PdEr silicide significantly reduced the electron Schottky barrier height and achieved low contact resistivity through a dopant segregation process, demonstrating its potential for low-resistance semiconductor contacts. | Shun-ichiro Ohmi, Yuya Tsukamoto, Weiguang Zuo, and Yasushi Masahiro | IEICE TRANSACTIONS on Electronics |
2017
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
Mechanism of soot oxidation over Ceo2-ZrO2 under O2 flow
| The soot oxidation mechanism on CeO₂-ZrO₂ mixed oxides was clarified using TEM-based analysis, TG-DTA, and oxygen isotope techniques. The results show that soot oxidation proceeds at the soot-catalyst interface and is primarily driven by highly active CeO₂ lattice oxygen, which initiates oxidation more effectively than surface-adsorbed oxygen. | Hitoshi Kubo, Yusuke Oshima, Takeshi Yamashita, Shunji Kikuhara, Noriyuki Saitoh, Noriko Yoshizawa, Osamu Nakagoe, and Shuji Tanabe | Bulletin of the Chemical Society of Japan |
Plating Machine for Semiconductor Wafer and the Future
| This review discusses advances in wafer plating equipment used in semiconductor manufacturing, focusing on uniformity, CUP-type systems, and stirrer design. It highlights current technology challenges and future development needs to improve plating performance and process consistency. | Hiroyuki Shoji | Journal of The Surface Finishing Society of Japan |
| A dual-function Ir catalyst was developed that operates as an anode for both hydrogenase-type fuel cells and photosystem II-inspired solar cells. | Mitsuhiro Kikkawa, Takeshi Yatabe, Takahiro Matsumoto, Ki-Seok Yoon, Kazuharu Suzuki, Takao Enomoto, Kenji Kaneko, and Seiji Ogo | ChemCatChem |
Wafer-to-wafer transportable gold particle plug for spot vacuum sealing of MEMS
| A low-temperature spot vacuum sealing technique using thermo-compression bonding at 160 °C was developed with a transportable Au particle plug. The deformable sintered Au structure enables reliable hermetic sealing with high tolerance to surface irregularities, achieving cavity pressures below 100 Pa and ultra-low leak rates suitable for MEMS integration. | Toshinori Ogashiwa, Kentaro Totsu, Mitsutomo Nishizawa, Hiroyuki Ishida, Kenichi Inoue, Yuya Sasaki, Masayuki Miyairi, Shuji Tanaka, and Masayoshi Esashi | IEEE Xplore |
Preparation of an Au-Pt alloy free from artifacts in magnetic resonance imaging
| Metallic implants can cause image artifacts during MRI, but metals remain essential for medical devices due to their conductivity and X-ray visibility. Material development is therefore focused on MRI-compatible metals that reduce artifacts without compromising performance. | Tomonobu Kodama, Ryusuke Nakai, Kenji Goto, Kunihiro Shima, and Hiroo Iwata | Magnetic Resonance Imaging |
PdYb-Silicide with Low Schottky Barrier Height to n-Si Formed from Pd/Yb/Si(100) Stacked Structures
| We report for the first time that silicidation of a Pd/Yb stacked structure on a Si substrate forms PdYb silicide, which reduces the electron (Schottky) barrier height to as low as 0.4 eV. | Shun-ichiro Ohmi, Mengyi Chen, Weiguang Zuo, and Yasushi Masahiro | IEICE TRANSACTIONS on Electronics |
An Origin for Lattice Expansion in PVP-Protected Small Pd Metal Nanoparticles
| EXAFS analysis was employed to investigate the origin of Pd-Pd bond elongation with decreasing particle size in PVP-stabilized Pd nanoparticles, revealing that the elongation is attributable to Pd-C bond formation. | Tadashi Ohba, Hitoshi Kubo, Yusuke Ohshima, Yuichi Makita, Noriaki Nakamura, Hiromitsu Uehara Satoru Takakusagi, and Kiyotaka Asakura | Bulletin of the Chemical Society of Japan |
| An Ir-containing Ni-based superalloy tool strengthened by γ′ precipitation demonstrated high durability and stable performance in friction stir spot welding of high-strength steel. The tool successfully produced defect-free spot welds in DP590 steel with minimal wear even after extended welding cycles, indicating strong potential for FSSW applications. | Kunihiro Tanaka, Tatsuya Nakazawa, Koichi Sakairi, Yutaka Sato, Hiroyuki Kokawa, Toshihiro Omori, and Kiyohito Ishida | Friction Stir Welding and Processing IX |
Role of Hydrophobic Catalyst to Enhance Safety of Nuclear Fusion as a Future Energy Source
| The utilization of hydrophobic catalysts is discussed, with particular emphasis on hydrogen oxidation and isotope exchange reactions. | Yasunori Iwai, Yuki Edao, Hitoshi Kubo, and Yusuke Oshima | Catalysis Society of Japan |
2015
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
| Research into organic semiconductor transistors in which contact electrodes are formed on organic semiconductors using a wet process. | M.Ito, U.Uno, J.Takeya | Organic Electronics |
| Research into organic semiconductor transistors in which contact electrodes are formed on organic semiconductors using a wet process. | S.Sakai, J.Soeda, R.Hausermann, H Matsui, C.Mitsui, T.Okamoto, M.Ito, K.Hirose, T.Sekiguchi, T.Abe, M.Uno, J.Takeya | Organic Electronics |
2013
| Title | Summary | Authors (Bold: TANAKA employee) | Publication Name |
|---|---|---|---|
High-performance solution-processed organic transistors with electroless-plated electrodes
| Research into organic semiconductor transistors in which contact electrodes are formed on organic semiconductors using a wet process. | M.Ito, T.Uemura, J.Soeda, J.Takeya | Organic Electronics |
Some listed authors are no longer with TANAKA. Their contributions were made during their tenure.