Patent ID: 11915920
Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The method according to claim 1, wherein in the processing the single crystal material, the single crystal material is thinned toward the end by setting irradiation conditions of the focused ion beam such that a current is 200 to 800 pA, a voltage is 20 to 40 kV, a position to be irradiated is moved scanning in a direction from an outer side to an inner side of the single crystal material, and irradiation time is 0.5 to 30 minutes, and thereafter the radius of curvature rN of the tip of the end is set to a value of 20% or less of the length dN of the single crystal material in the lateral direction by setting the irradiation conditions of the focused ion beam such that a current is 10 to 100 pA, a voltage is 2 to 10 kV, a position to be irradiated is moved scanning in a direction from an outer side to an inner side of the single crystal material, and irradiation time is 0.5 to 10 minutes.