MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Influence of Reductant Concentration on the Conduction Path Formation Properties of Solderable Polymer Composites
Byung-Seung YimJeong Il LeeJong-Min Kim
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2018 Volume 59 Issue 9 Pages 1528-1531

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Abstract

When solderable polymer composites (SPCs) filled with a low-melting-point-alloy (LMPA) was used in the bonding process, the elimination of surface oxide layers of the fillers and electrodes is very important to achieve an excellent conduction path by the proper coalescence-wetting behaviors of molten fillers. In this study, to investigate the influence of reductant content on the conduction path formation, four kinds of SPC with different reductant amounts (0, 7.5, 15, and 30 phr) were examined. The LMPA filler with a reductant concentration of 15 phr exhibits excellent wettability because of the proper elimination of the surface oxide layer of fillers and electrodes. However, the wettability deteriorated with a further increased reductant content due to the rapid curing of the SPC at low temperature conditions caused by increased chemical reactions between the carboxyl groups of the reductant and epoxide groups.

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© 2018 The Japan Institute of Metals and Materials
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