WB-2-4

Development of ultra-fine multifilamentary REBCO coated conductors using photolithography technique

14:30-14:45　28/11/2023

*Akiyoshi MATSUMOTO, Minoru TACHIKI, Shuuichi OOI (NIMS), Ryo TERANISHI, Satoshi HATA (Kyushu Univ.), Toshiya DOI (Kyoto Univ.), Masanori DAIBO, Yasuhiro Iijima (Fujikura Co.), Masayoshi INOUE (Fukuoka Ins. Tech.
National Institute for Materials Science (NIMS), Tsukuba, Japan,
Kyushu University, Fukuoka, Japan
Kyoto University, Kyoto, Japan
Fujikura Ltd, Chiba, Japan
Fukuoka Institute of Technology, Fukuoka, Japan
Abstract Body

REBCO superconductors are expected to be used under low temperature and high magnetic field conditions and applied to electrical power equipment, and many companies supply commercialized wires. The superconducting wires currently on the market have a tape-like shape, and are produced by stacking multiple buffer layers on a thin metal plate, arranging the degree of orientation, and then using a thin film deposition method such as vapor deposition. This flat superconducting film has nearly three crystal axes and exhibits high critical current density characteristics. In order to reduce shielding current or reduce AC loss, it is necessary to thin the wire. In this study, a pattern was formed on the substrate before deposition of the REBCO layer using lithography technique(1). Various striped structures could be produced, and patterns could be applied even on metal substrates, demonstrating the possibility of ultra-fine multifilamentary wire. In this report, we will further discuss the results of microstructure observations.

References

(1) A. Matsumoto, M. Tachiki, S. Ooi, IEEE Trans. Appl. Aupercond. 33, 7500404(2023)

Acknowledgment

This work partly supported by Iketani Science and Technology Foundation.