Toshiya Kumagai

Title: Toshiya Kumagai: Innovator in Oxide Superconductors

Introduction

Toshiya Kumagai is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the field of superconductivity, holding a total of 15 patents. His work focuses on oxide superconductors, which have important applications in various technologies.

Latest Patents

Kumagai's latest patents include innovations in oxide superconductor thin films and superconducting fault current limiters. One of his notable inventions describes an oxide superconducting thin film that consists of a substrate, an intermediate layer, and a superconducting layer. The intermediate layer has an average thickness ranging from 10 nm to 20 nm, with a surface roughness Ra of 0.5 nm or less. The superconducting layer is formed on the intermediate layer's surface and primarily consists of an oxide superconductor. Additionally, he has developed a superconducting fault current limiter that incorporates this oxide superconducting thin film. Another patent details a method for manufacturing oxide superconducting thin films, emphasizing the importance of the substrate's single crystal structure and the orientation of the layers.

Career Highlights

Throughout his career, Toshiya Kumagai has worked with esteemed organizations such as the National Institute of Advanced Industrial Science and Technology and the Agency of Industrial Science and Technology. His research has significantly advanced the understanding and application of superconducting materials.

Collaborations

Kumagai has collaborated with notable colleagues, including Tetsuo Tsuchiya and Takaaki Manabe. Their joint efforts have contributed to the development of innovative technologies in the field of superconductivity.

Conclusion

Toshiya Kumagai's contributions to the field of oxide superconductors have established him as a key figure in innovation. His patents and collaborations continue to influence advancements in superconducting technologies.