| 摘要 |
PROBLEM TO BE SOLVED: To increase joint strength while suppressing the occurrence of cracks in a bonding wire, in a bonding capillary.SOLUTION: A bonding capillary according to an embodiment includes: a pressing surface pressing a bonding wire; an insertion hole through which the bonding wire is inserted; a tapered hole communicating the insertion hole with the pressing surface and expanding toward the pressing surface; and a chamfered portion provided between the tapered hole and the pressing surface. The chamfered portion has an irregular profile on a surface thereof, and the sharpness of projecting portions at the irregular profile is lower than that of recessed portions at the irregular profile.SELECTED DRAWING: Figure 7 |
