Improvement of adhesion and electrical properties of reworkable thermoplastic conductive adhesives
- 1 January 2003
- journal article
- Published by Taylor & Francis Ltd in Journal of Adhesion Science and Technology
- Vol. 17 (13), 1785-1799
- https://doi.org/10.1163/156856103322538688
Abstract
The adhesion and electrical properties of a PAE-2-based isotropically conductive adhesive (ICA) material were investigated. PAE-2 (thermoplastic polymer)-based ICAs, as well as a commercial epoxy-based ICA, showed dramatic reduction in adhesion to a NiAu surface after the 85°C/85% RH aging test, while the adhesion to a SnPb surface did not change much. To improve the adhesion strength of PAE-2 to a Ni:Au surface after the humidity aging test, coupling agents and epoxy blends were used. The formulation with a higher amount of epoxy showed a higher adhesion strength. The combined use of epoxy blending and coupling agents was effective in increasing the adhesion strength of PAE-2 before aging and also in maintaining adhesion at a 50% level after humidity aging. However, its adhesion strength to NiAu was reduced to less than 50% after 85°C/85% RH aging. PAE-2-based ICAs showed excellent reworkability.Keywords
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