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J.N. Heo, J.H. Lee, D.J. Park, S.Y. Kim, D.H. Shin, Y.S. Kim
Characteristics of composite solder balls produced by an in‐situ processing Part 2: reflow solderability of the Sn‐Ag in‐situ composite solder ball
J. Evans
Electroplating and Metal Finishing
B.F. Rothschild, S. Ander
Plating
S. Matsushita
J. Met. Finishing. Soc.
A. Tan (1992)
Tin and solder plating in the semiconductor industry : a technical guide
B. Skirstymonskaya (1964)
ELECTRODEPOSITION OF ALLOYSRussian Chemical Reviews, 33
T.Y. Pang, H.D. Blair, J.M. Nicholson, S.W. Oh
Advances in Electronic Packaging
J.Cl. Puippe, W. Fluehmann
Plating and Surface Finishing
J.H. Lau
Flip Chip Technologies
A.C. Tan
Tin and Solder Plating in the Semiconductor Industry
R. Tummala, E. Rymaszewski, Y. Lee (1988)
Microelectronics Packaging Handbook
Sn‐Pb and Sn‐Ag bumps (130 μ m diameter, 250 μ m pitch) made using an electroplating process were studied. As a preliminary experiment, the effects of current density and plating time on the Sn‐Pb and Sn‐Ag deposits were investigated. The morphology and composition of the plated surface were examined using scanning electron microscopy. The shape and thickness of the solder bumps were also compared. Bump shear testing was performed to measure the adhesion strength between the solder bumps and the under bump metallurgy. In electroplating, the Sn‐Ag plating thickness was proportional to the current density, while plated Sn‐Pb thickness saturated above the limiting current density. The optimal conditions for solder bump fabrication were found at 6 A/dm 2 for 3 h in the case of Sn‐Pb bump plating and 6 A/dm 2 for 1 h for the Sn‐Ag bump plating. The bump shear strength for Sn‐Ag was found to be higher than that of Sn‐Pb.
Soldering & Surface Mount Technology – Emerald Publishing
Published: Aug 1, 2003
Keywords: Flip chip; Lead‐free soldering; Electroplating
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