16th International WorkShop on New Group IV Semiconductor Nanoelectronics
(Satellite workshop of ICSI/ISTDM 2025)

November 17-18, 2025,
Conference Room & Room A401 (4th Floor),
Laboratory for Nanoelectronics and Spintronics,
Research Institute of Electrical Communication (RIEC), Tohoku University, Sendai, Japan

Co-sponsored by
- Adopting Sustainable Partnerships for Innovative Research Ecosystem (ASPIRE), Japan Science and Technology Agency (JST)
- Cooperative Research Project Program of the Research Institute of Electrical Communication, Tohoku University



   Technical Program




   

November 17 (Monday), 2025


   

08:50 - 09:00

  Introductory     Masao Sakuraba (RIEC, Tohoku Univ.)

 

   

[ Session 1 : Invited & Regular Talks]


   

09:00 - 09:20 (20 min)


O-01. " Introduction of the ASPIRE project: Versatile Quantum Engineering of Group-IV Alloy Materials for Semiconductor Heterogeneous Integrated Devices",

  Osamu Nakatsuka
Graduate School of Engineering, Nagoya University, Japan

   

09:20 - 09:50 (30 min)

I-01. "

JST / ASPIRE project Versatile Quantum Engineering of Group-IV Alloy Materials for Semiconductor Heterogeneous Integrated Devices: Imec’s involvement",

  (Invited)
Roger Loo 1,2, Y. Shimura 1, H. Kuwazuru 1,3, K. Yamamoto 3,4, D. Wang 3, C. Porret 1, T. Dursap 1, A. Akula 1, D. Schippers 1, O. Nakatsuka 5 and R. Langer 1
1 Imec, Belgium
2 Dep. of Solid-State Sciences, Ghent University, Belgium
3 Faculty of Eng. Science, Kyushu University, Japan
4 Kumamoto Univ., Japan
5 Graduate School of Engineering, Nagoya University, Japan


   

09:50 - 10:20 (30 min)

I-02. "

Challenges and research perspectives in Aspire project",


  (Invited)
Dan Buca 1
1
Forschungszentrum Jülich, Germany




10:20 - 10:50 (30 min)

I-03. "

SiGe Photonic Technologies for Sustainable Sensor Applications",




(Invited)
Andreas Mai 1,2, Tabea Fünning 1, Christian Mai 1 and Patrick Heise 1,3
1 IHP - Leibniz-Institut für innovative Mikroelektronik,Germany

2 Technical University of Applied Science Wildau, Germany
3 Technical University of Applied Science Mittelhessen, Germany


   

10:50 - 11:20 (30 min)

I-04. "

Vertically Stacked Ge Spintronics Devices on Si",




(Invited)
Kohei Hamaya 1,2,3, Shimon Watahiki 2, Sora Obinata 1,3, Shuya Kikuoka 4, Michihiro Yamada 4, Kentarou Sawano 4 and Shinya Yamada 1,2,3
1 Center for Spintronics Research Network, Graduate School of Engineering Science, The University of Osaka, Japan
2 Department of Systems Innovation, Graduate School of Engineering Science, The University of Osaka, Japan
3 Spintronics Research Network Division, Institute for Open and Transdisciplinary Research Initiatives, The University of Osaka, Japan
4 Advanced Research Laboratories, Tokyo City University, Japan

   




11:20 - 12:20 Group Photo & Lunch







[ Session 2 : Invited & Regular Talks ]




12:20 - 12:50 (30 min)

I-05. " Si Atomic-Layer Epitaxy in Ge Using SiH2Cl2",


(Invited)
Yuji Yamamoto 1,2, W.-C. Wen 1, M.A. Schubert 1, F. Bärwolf 1, D. Steckler 1, J. Murota 3 and B. Tillack 1,4

1 IHP - Leibniz-Institut für innovative Mikroelektronik, Germany
2 Nagoya University, Japan
3 Micro System Integration Center, Tohoku University, Japan
4 Technische Universität Berlin, Germany





12:50 - 13:20 (30 min)

I-06. " Low temperature SiGe:B source/drain epitaxy for CFET applications",


(Invited)
Thomas Dursap 1, C. Porret 1, A. Merkulov 1, P. Favia 1, R. Langer 1, M.-S. Kim 1, N. Hiroguchi 1 and R. Loo 1,2,
1 Imec, Kapeldreef 75, 3001 Leuven, Belgium
2 Dep. Of Solid-State Sciences, Ghent University, Krijgslaan 285, 9000 Ghent, Belgium




13:20 - 13:50 (30 min)

I-07. " Low Temperature Gate Stack fabrication for Ge and GeSn Novel Devices",


(Invited)
Keisuke Yamamoto 1,2, Taisei Aso 2, Hajime Kuwazuru 2 and Dong Wang 2
1 REISI, Kumamoto Univ., Japan
2 Kyushu Univ., Japan




13:50 - 14:10 (20 min)

O-02. " Formation of Ultrathin Single-Crystalline NiSi2-on-Insulator by RTA of a-Si/Ni Stacked Films Formed on SOI Substrates",


Yuki Imai 1, Shun Tanida 1, Yuji Yamamoto 2,1, Noriyuki Taoka 3 and Katsunori Makihara 1,2
1 Graduate School of Engineering, Nagoya University, Japan
2 IHP – Leibniz-Institut für Innovative Mikroelektronik, Germany
3 Graduate School of Engineering, Aichi Institute of Technology, Japan




14:10 - 14:30 (20 min)

O-03. " Epitaxial growth of Si/SiGe and Ge/SiGe stacks using isotopically purified 28SiH4 and 73Ge-depleted GeH4 for spin qubit",


Yosuke Shimura 1, R. Loo 1,2, C. Godfrin 1, S. Kubicek 1, D. Wan 1 and K. De Greve 1,3
1 Imec, Belgium
2 Dep. of Solid-State Sciences, Ghent University,  Belgium
3 KU Leuven, Micro and Nano Systems, Belgium





14:30 - 14:50 (20 min)

O-04. " CSiGeSn Epitaxy: Future Isovalent Isomorphism in Group-IV Materials",


Ambrishkumar J. Devaiya 1,4, Omar Concepcion 1, Thomas Fischer 4, Andreas Tiedemann 1, Giovanni Capellini 2,3, Sanjay Mathur 4, Detlev Grützmacher 1 and Dan Buca 1
1 Peter Gruenberg Institute-9 and JARA-Fundamentals of Future Information Technologies, Forschungszentrum Jülich, Germany
2 IHP - Leibniz Institut für innovative Mikroelektronik, Germany
3 Dipartimento di Scienze, Università Roma Tre, Italy
4 Institute of Inorganic and Materials Chemistry, University of Cologne, Germany








14:50 - 15:10 Break







[ Session 3 : Invited Talks ]




15:10 - 15:40 (30 min)

I-08. " Progress in multicrystalline informatics",


(Invited)
Noritaka Usami 1,2,3
1 Graduate School of Engineering, Nagoya University, Japan
2 Institute of Materials and Systems for Sustainability, Nagoya University, Japan
3 Institutes of Innovation for Future Society, Nagoya University, Japan




15:40 - 16:10 (30 min)

I-09. " In-situ Temperature Monitoring of Silicon Wafer During Plasma Processing by Optical Interference Contactless Thermometry",


(Invited)
Seiichiro. Higashi, R. Goto, J. Yu and H. Hanafusa

Graduate School of Advanced Science and Engineering, Hiroshima University, Japan




16:10 - 16:40 (30 min)

I-10. " (111)-oriented thin body GOI n-MOSFET fabricated by wafer bonding technology",


(Invited)
Shinichi Takagi 1,2, Xueyang Han 1, Kei Sumita 1, Mitsuru Takenaka 1 and Kasidit Toprasertpong 1
1 The University of Tokyo, Japan
2 Teikyo University, Japan





16:40 - 17:10 (30 min)

I-11. " Imprinted n+-Si/p-Ge hetero-junction with a thin interface layer",


(Invited)
Akira Toriumi
Free Engineer, Japan




     






 

November 18 (Tuesday), 2025





[ Session 4-1 : Short Talks for Poster ]





08:30 - 08:35 (5 min)

P-01. "

Fabrication Process of Heavily-Doped Si Tunnel Diodes for Achieving Negative Differential Resistance for Neuromorphic Computing",

  Seima Sato 1, Masao Sakuraba 1,2 and Shigeo Sato 1,2
1 Laboratory for Nanoelectronics and Spintronics, Research Institute Electrical Communication, Tohoku University, Japan
2 Graduate School Engineering, Tohoku University, Japan





08:35 - 08:40 (5 min)

P-02. "

Process Development of Interface Structure Control for Next-Generation High-Performance SiC Power MOS Transistors",

  Tetsuya Ueno 1, Masao Sakuraba 1,2 and Shigeo Sato 1,2
1 Laboratory for Nanoelectronics and Spintronics, Research Institute Electrical Communication, Tohoku University, Japan
2 Graduate School Engineering, Tohoku University, Japan




08:40 - 08:45 (5 min)

P-03. "

Measurement of thermoelectric Properties of Electrodeposited CuI and Cs-CuI membranes",

  Natsuki Oda 1, Kei Sakamoto 1, Nguyen Van Toan 1, Jakrit Gobpant 2, Nattharika Theekhasuk 2, Aparporn Sakulkalavek 2 and Takahito Ono 1,3
1 Graduate School of Engineering, Tohoku University, Japan
2 Department of Physics, School of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
3 Micro System Integration Center, Tohoku University, Japan





08:45 - 08:50 (5 min)

P-04. "

Enhanced Thermoelectric Performance of Electrochemically Deposited Cellulose Nanofiber-Bismuth Telluride Nanocomposite",

  Jianghan Tian, Nguyen Van Toan, and Takahito Ono
Graduate School of Engineering, Tohoku University, Japan




08:50 - 08:55 (5 min)

P-05. "

Evaluation of Ge/SiGe(111) Multilayer Structures for Spintronic Applications",

  Shunsuke Tanaka 1, Sora Obinata 2, Shuya Kikuoka 3, Kenji Oki 1,2, Kentarou Sawano 3, Kohei Hamaya 1,2,4
1 Department of Systems Innovation, Graduate School of Engineering Science,
The University of Osaka, Japan
2 Center for Spintronics Research Network, Graduate School of Engineering Science, The University of Osaka, Japan
3 Advanced Research Laboratories, Tokyo City University, Japan
4 Spintronics Research Network Division, Institute for Open and Transdisciplinary Research Initiatives, The University of Osaka, Japan





08:55 - 09:00 (5 min)

P-06. "

Charge Transport Properties through Multiple-Stacked Si Nanodots",

  Haruto Kubota 1, Jongeun Baek 1, Yuki Imai 1, Noriyuki Taoka 2 and Katsunori Makihara 1
1
Nagoya University, Japan
2 Aichi Institute of Technology, Japan





09:00 - 09:05 (5 min)

P-07. "

Radical Effects on Si and Si0.7Ge0.3 during CF4/H2 Plasma Exposure",

  Ibuki Saburi 1, Yuki Imai 1, Takayoshi Tsutsumi 1,2, Kenji Ishikawa 1,2, Yuji Yamamoto 3,1, Wei-Chen Wen 3 and Katsunori Makihara 1,3
1 Graduate School of Engineering, Nagoya University, Japan
2 Center for Low-temperature Plasma Sciences, Nagoya University, Japan
3 IHP – Leibniz-Institut für Innovative Mikroelektronik, Germany





09:05 - 09:10 (5 min)

P-08. "

Evaluation of Si-Nanosheets Formed by CF4/H2 Plasma Etching of Si0.7Ge0.3/Si/Si0.7Ge0.3 Stacked Structures",

  Kotaro Ozaki 1, Yusuke Imai 1, Yuki Imai 1, Takayoshi Tsutsumi 2, Kenji Ishikawa 2,
Yuji Yamamoto 3,1, Wei-Chen Wen 3, Ibuki Saburi 1 and Katsunori Makihara 1,3​

1 Graduate School of Engineering, Nagoya University, Japan
2 Center for Low-temperature Plasma Sciences, Nagoya University, Japan
3 IHP-Leibniz-Institut für Innovative Mikroelektronik, Germany





09:10 - 09:15 (5 min)

P-09. " Analysis of Interfacial Passivation Mechanism of Niobium Titanium Oxide on Silicon",


Shohei Fukaya 1, Kazuhiro Gotoh 1,2,3, Yasuyoshi Kurokawa 1,4, and Noritaka Usami 1,4,5
1 Graduate School of Engineering, Nagoya University, Japan
2 Graduate School of Science and Technology, Niigata University, Japan
3 Interdisciplinary Research Center for Carbon-Neutral Technologies, Niigata University, Japan
4 Institutes of Innovation for Future Society, Nagoya University, Japan
5 Institute of Materials and Systems for Sustainability, Nagoya University, Japan




09:15 - 09:20 (5 min)

P-10. " Strain Effects on the Photoluminescence of Ge QDs on Si Nanotips: Modeling and Experimental Analysis",


Diana Ryzhak 1, Petr Klenovský 2, Johannes Aberl 3, Enrique Prado-Navarrete 3, Lada Vukušić 3, Oliver Skibitzki 1, Marvin Hartwig Zoellner 1, Markus Andreas Schubert 1, Moritz Brehm 3, Davide Spirito 4 and Giovanni Capellini 1,5
1 IHP – Leibniz Institute or High Performance Microelectronics, Germany
2 Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Czech Republic
3 Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Austria
4 BCMaterials, Basque Center for Materials, Applications and Nanostructures, Spain
5 Dipartimento di Scienze, Università Roma Tre, Italy




09:20 - 09:25 (5 min)

P-11. " Growth of Vertically Oriented Ge Wires on Quartz Substrate by Plasma Enhanced CVD",


Michael Uematsu and Shin-ichi Kobayashi
Graduate School of Engineering, Tokyo Polytechnic University, Japan




09:25 - 09:30 (5 min)

P-12. " Effects of Post-Annealing on Sn-Doped Poly-Ge Thin Films on Insulating Substrates",


Reo Imada 1, Takuto Watanabe 1, Takashi Kajiwara 1, and Taizoh Sadoh 2​
1 Department of Electronics, Kyushu University, Japan
2 Center for Semiconductor and Device Ecosystem, Kyushu University, Japan




09:30 - 09:35 (5 min)

P-13. " Large-Grain Crystallization of Si Thin Films on Insulator by Sn-Doping",


Tomoki Tokunaga 1, Shuma Akiyoshi 1, Takashi Kajiwara 1, and Taizoh Sadoh 2​
1 Department of Electronics, Kyushu University, Japan
2 Center for Semiconductor and Device Ecosystem, Kyushu University, Japan




09:35 - 09:40 (5 min)

P-14. " Low-Temperature Fabrication of GeSn Photodiodes Featuring a Metal/Ultra-Thin Oxide/Semiconductor/Metal Structure",


Yajun Feng 1, Genya Kuroeda 1, Keisuke Yamamoto 2,3, Shigehisa Shibayama 4, Osamu Nakatsuka 4,5, and Dong Wang 1,3​
1 Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Japan
2 Research and Education Institute for Semiconductors and Informatics, Kumamoto University, Japan
3 Faculty of Engineering Sciences, Kyushu Univ., Japan
4 Graduate School of Engineering, Nagoya Univ., Japan
5 IMaSS, Nagoya Univ., Japan




09:40 - 09:45 (5 min)

P-15. " Improvement of Electrical Properties and VFB Control of SiO2/GeO2 Gate Stack in Low Temperature Process",


Hajime Kuwazuru 1, Dong Wang 2 and Keisuke Yamamoto 2,3​
1 Interdisciplinary Graduate School of Engineering Science, Kyushu University, Japan
2 Faculty of Engineering Science, Kyushu University, Japan
3 Research and Education Institute for Semiconductors and Informatics, Kumamoto University, Japan




09:45 - 09:50 (5 min)

P-16. " Fabrication and Characterization of Ge Photodetectors with a Metal/Ge/Ultra-Thin Oxide/Metal Structure for CMOS Compatible Optoelectronic Integration",


Genya Kuroeda 1, Yajun Feng 1, Keisuke Yamamoto 2,3 and Dong Wang 3​
1 Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Japan
2 Research and Education Institute for Semiconductors and Informatics, Kumamoto University, Japan
3 Faculty of Engineering Sciences, Kyushu University, Japan




09:50 - 09:55 (5 min)

P-17. " Atomic Layer Deposition of GeO2 for Surface Passivation in GeSn/Ge pn Diodes",


Yoshiki Kato 1, Mitsuo Sakashita 1, Masashi Kurosawa 1, Osamu Nakatsuka 1,2 and Shigehisa Shibayama 1​
1 Graduate School of Engineering, Nagoya University, Japan
2 Institute of Materials and Systems for Sustainability, Nagoya University, Japan




09:55 - 10:00 (5 min)

P-18. " Epitaxial growth of Ge1−xSnx layers with various Sn composition on Si substrates using sputtering method",


Kousaku Goto 1, Shigehisa Shibayama 1, Mitsuo Sakashita 1, Masashi Kurosawa 1 and Osamu Nakatsuka 1,2​
1 Graduate School of Engineering, Nagoya Univ., Japan
2 IMaSS, Nagoya Univ., Japan




10:00 - 10:05 (5 min)

P-19. " Phonon-drag effect observed for phosphorus-doped Si films and FZ-Si(001) substrates interface",


Yuki Kimura 1, Shigehisa Shibayama 1, Mitsuo Sakashita 1, Osamu Nakatsuka 1,2, Yasuyoshi Kurokawa 1,3, Noritaka Usami 1,2,3, Takayoshi Katase 4 and Masashi Kurosawa 1​
1 Graduate School of Engineering, Nagoya University, Japan
2 Institute of Materials and Systems for Sustainability, Nagoya University, Japan
3 Institutes of Innovation for Future Society, Nagoya University, Japan
4 Materials and Structures Laboratory, Institute of Integrated Research, Institute of Science Tokyo, Japan




10:05 - 10:10 (5 min)

P-20. " Synthesis of GeH layers on Ge/Si(111) at room temperature",


Kaito Nakajima 1, Atsuki Nakayama 1, Wei-Chen Wen 2, Yuji Yamamoto 2, Shigehisa Shibayama 1, Mitsuo Sakashita 1, Osamu Nakatsuka 1,3, Masaaki Araidai 1,3 and Masashi Kurosawa 1
1 Graduate School of Engineering, Nagoya University, Japan
2 IHP – Leibniz Institute for High Performance Microelectronics, Germany
3 Institute of Materials and Systems for Sustainability, Nagoya University, Japan




10:10 - 10:15 (5 min)

P-21. " Examination of the transfer process of a Ge layer on sapphire substrates",


Mahiro Tanaka 1, Wei-Chen Wen 2, Yuji Yamamoto 2, Shigehisa Shibayama 1, Mitsuo Sakashita 1, Osamu Nakatsuka 1,3 and Masashi Kurosawa 1​
1 Grad. Sch. of Eng., Nagoya Univ., Japan
2 IHP-Leibniz Institute for High Performance Microelectronics, Germany
3 IMaSS, Nagoya Univ., Japan




10:15 - 10:20 (5 min)

P-22. " Formation of Ge epitaxial layer on Si(111) substrate using sputtering method",


Taichi Okuda 1, Akio Ohta 2, Ryo Yokogawa 3,4,5, Mitsuo Sakashita 1, Masashi Kurosawa 1, Osamu Nakatsuka 1 and Shigehisa Shibayama 1
1 Grad. Sch. of Eng., Nagoya University, Japan
2 Faculty of Sci., Fukuoka University, Japan
3 MREL, Meiji University, Japan
4 RISE, Hiroshima University, Japan
5 Grad. Sch. of Adv. Sci. and Eng., Hiroshima University, Japan




10:20 - 10:25 (5 min)

P-23. " Demonstration of Epitaxial Growth of Ultra-High Sn Composition Ge1−xSnx on GaSb(111)",


Kaito Shibata 1, Shigehisa Shibayama 1, Mitsuo Sakashita 1, Masashi Kurosawa 1 and Osamu Nakatsuka 1,2
1 Graduate School of Engineering, Nagoya University, Japan
2 Institute of Materials and Systems for Sustainability, Nagoya University, Japan







[ Session 4-2 : Poster Presentation ]




10:30 - 11:50 Poster Presentation (P-01 ~ P-23, 80 min, Room A401 + ... )







11:50 - 13:10 Lunch







[ Session 5: Invited & Regular Talks ]




13:10 - 13:40 (30 min)

I-12 " Development of GeSn/GeSiSn resonant tunneling diode operating at room temperature",


(Invited)
Shigehisa Shibayama 1, Shota Torimoto 1, Shuto Ishimoto 1, Yoshiki Kato 1, Mitsuo Sakashita 1, Masashi Kurosawa 1 and Osamu Nakatsuka 1,2

1 Graduate School of Engineering, Nagoya University, Japan
2 Institute of Materials and Systems for Sustainability, Nagoya University, Japan




13:40 - 14:10 (30 min)

I-13 " Semiconductor-Like Bio-Composite Films for Resistive Biosensing Applications",


(Invited)
Takahito Ono 1, Yi-Hsiu Kao 1, Reo Takahashi 1, Rahul Kumar 1
, Truong Thi Kim Tuoi 1, Nguyen Van Toan 1, Mikio Fukuhara 2, Tetsuo Samoto 2, Toshiyuki Hashida 2 and Takaaki Abe 3
1 Department of Mechanical Systems Engineering, Tohoku University, Japan
2 New Industry Creation Hatchery Centre, Tohoku University, Japan
3 School of Medicine, Tohoku University, Japan




14:10 - 14:40 (30 min)

I-14. " Development of High-Performance Group-IV Semiconductor Devices for Robust Neuromorphic Computing Integrated Circuits",


(Invited)
Masao Sakuraba 1,2, Shigeo Sato 1,2 and Hiroyuki Nagasawa 3
1 Laboratory for Nanoelectronics and Spintronics, Research Institute Electrical Communication, Tohoku University, Japan
2 Gradaduate School of Engineering, Tohoku University, Japan
3 CUSIC Inc., Japan




14:40 - 15:00 (20 min)

O-05. " Room-temperature Spin Injection and Transport in Ge/SiGe Multilayer Structures",


Sora Obinata 1, Kenji Oki 1,2, Shunsuke Tanaka 1,2, Shuya, Kikuoka 3, Kentarou Sawano 3 and Kohei Hamaya 1,2,4
1 Center for Spintronics Research Network, Graduate School of Engineering Science, The University of Osaka, Japan
2 Department of Systems Innovation, Graduate School of Engineering Science,
The University of Osaka, Japan
3 Advanced Research Laboratories, Tokyo City University, Japan
4 Spintronics Research Network Division, Institute for Open and Transdisciplinary Research Initiatives, The University of Osaka, Japan





15:00 - 15:20 (20 min)

O-06. " Control of Localized SiGe Nanodot Formation in Si/SiGe superlattices via Strain Engineering",


Wei-Chen Wen 1, Katsunori Makihara 2,1, Andreas Mai 1,3, Bernd Tillack 1,4 and Yuji Yamamoto 1,2
1 IHP - Leibniz-Institut für innovative Mikroelektronik, Germany
2 Nagoya University, Japan
3 Technical University of Applied Science Wildau, Germany
4 Technische Universität Berlin, Germany




   

15:20 - 15:30 Closing Remarks & Group Photo