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JWJ > Volume 21(5); 2003 > Article
Journal of KWJS 2003 September;21(5) :56-61.
Published online September 25, 2003.
Modeling of Soldering Process using Longitudinal Ultrasonic
JungH. Kim, Jihye Lee, ChoongD. Yoo, DooS. Choi



Correspondence:   Published online September 25, 2003
ABSTRACT
An efficient soldering process using the longitudinal ultrasonic vibration is introduced in this work for electronic packaging. The effects of the process parameters such as the ultrasonic frequency, amplitude, dimension of the metal bump and solder are analyzed through a viscoelastic lumped model. The viscoelastic properties of the eutectic solder were measured for calculation and evaluation of heat generation capability of the solder. Experiments were conducted to verify the possibility of the proposed ultrasonic soldering method by inserting the Cu and Au bumps into the solder block. Localized heating due to ultrasonic vibration melts the solder near the metal bump, which demonstrates the applicability of the ultrasonic soldering method to the high-density electronic packaging.
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