Effect of bump characteristics and temperature variation on the online contact resistance of anisotropic conductive joints

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)1028-1035
Journal / PublicationJournal of Electronic Materials
Volume33
Issue number9
Publication statusPublished - Sept 2004

Abstract

The effect of bump characteristics and temperature variation on the online contact resistance of anisotropic conductive joints was studied. It was observed that the factor of thermal warpage lead to a highly unreliable electrical connection in the assembly. The anisotropic conductive film (ACF) that was used is an epoxy resin in which nickel and gold-coated polymer balls are dispersed. The results showed that for the flip-chip-on-flex (FCOF) packages having an Au/Ni bump, the increase in online contact resistance is higher than that of the FCOF packages having bumpless chips.

Research Area(s)

  • Anisotropie conductive film (ACF), Coefficient of thermal expansion (CTE), Online contact resistance, Reliability, Thermal warpage