Strength of Lead-free BGA Spheres in High Speed Loading
Published: |
April 8, 2008 |
Author: |
Keith Sweatman, Shoichi Suenaga, Tetsuro Nishimura |
Abstract: |
Concern about the failure of lead-free BGA packages when portable devices such as cell phones are accidentally dropped and a general concern about the resistance of these packages under shock loading has prompted an interest in the impact strength of the soldered BGA connection. This paper reports the results of the measurement of the impact strength of lead-free 0.5±0.01mm diameter BGA spheres on 0.42mm solder mask defined pads on copper/OSP and ENIG substrates using recently developed equipment that can load individual BGA spheres at high strain rates in shear and tension.... |
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