[11p-A24-1~6] 3.6 Laser processing

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)

[11p-A24-6] Process Window Exploration for Ultrafast Laser Scribing of REBCO HTS Tapes

Masaki Yumoto¹, 〇Dai Yoshitomi¹, Shinichi Kinugasa¹, Yuka Yamamuro¹, Hideyuki Takada¹, Hidekazu Hara², Yasuhisa Katayama², Kiyoshige Hirose², Aiko Narazaki¹ (1.AIST, 2.Furukawa Electric)

Keywords:

ultrashort-pulse laser processing,high-temperature superconductivity,laser scribing

Multifilamentation is effective for reducing AC losses in REBa₂Cu₃O_7-x(REBCO) high-temperature superconducting tapes, and thus a laser scribing technique that is fine, low-damage, and high-throughput is required. We investigated the process window using ultrashort-pulse laser processing, with pulse energy, pulse width, and scanning speed as the main parameters. The influence on the formation of a modified layer is also discussed.