발간논문

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Vol.38, No.9, 1284 ~ 1291, 2000
Title
Characteristics of the Sn-Pb Eutectic Solder Bump Formed via Fluxless Laser Reflow Soldering
이종현Jong Hyun Lee,박대진Dae Jin Park,이용호Yong Ho Lee,신동혁Dong Hyuk Shin,김용석Yong Suk Kim
Abstract
In an attempt to develop a fluxless reflow solder bumping process, the effects of processing variables, which include energy input rate and time, and the shape of solder disk on the microstructure of the solder/Cu pad interface and the shear strength of the joints were investigated. It was demonstrated that a proper combination of the variables could lead to the formation of a spherical solder bump with shear strength comparable to that formed via the conventional reflow soldering process. In addition, the kinetics of Cu pad dissolution into the solder during laser heating was modeled numerically to elucidate intermetallic formation mechanism at the solder/Cu pad interface.
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