title: High-frequency ultrasonic wire bonding systems
abstract: The vibration characteristics of longitudinal-complex transverse vibration systems with multiple resonance frequencies of 350-980 kHz for ultrasonic wire bonding of IC, LSI or electronic devices were studied. The complex vibration systems can be applied for direct welding of semiconductor tips (face-down bonding, flip-chip bonding) and packaging of electronic devices. A longitudinal-complex transverse vibration bonding system consists of a complex transverse vibration rod, two driving longitudinal transducers 7.0 mm in diameter and a transverse vibration welding tip. The vibration distributions along ceramic and stainless-steel welding tips were measured at up to 980 kHz. A high-frequency vibration system with a height of 20.7 mm and a weight of less than 15 g was obtained.
authors.affiliation: Faculty of Engineering, Kanagawa University, Yokohama, Japan. tsujino@cc.kanagawa-u.ac.jp
authors.initials: J
authors.lastname: Tsujino
authors.initials: H
authors.lastname: Yoshihara
authors.initials: T
authors.lastname: Sano
authors.initials: S
authors.lastname: Ihara