e-ISSN 2231-8542
ISSN 1511-3701

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Intermetallic Growth of SAC237 Solder Paste Reinforced with MWCNT

AzmahHanim, M. A., Mohamad Aznan, M. N., Muhammad Raimi, R. and Muhammad Azrol Amin, A.

Pertanika Journal of Tropical Agricultural Science, Volume 25, Issue 4, October 2017

Keywords: As reflow, ENIG, SAC237, immersion tin, intermetallic compound, multi-walled carbon nanotubes

Published on: 09 Oct 2017

The formation of intermetallic compound (IMC) layer at the interfaces of pad finishes has been studied. The growth of IMC layer as a reflow process and its properties were also discussed. In this study, solder alloy SAC237 (Sn: 99 wt.%, Ag: 0.3 wt.%, Cu: 0.7 wt.%), reinforced with 0.01 wt.% Multi-Walled Carbon Nanotubes (MWCNTs), was mixed to form a composite solder paste and soldered on Electroless Nickel Immersion Gold (ENIG) and Immersion Tin (ImSn) pad finishes. Reflow process was conducted in oven with specific reflow profile. The growth and properties of IMC layer were analysed using optical microscope with image analyser. Results showed that the thickness of IMC layer for ENIG and ImSn were 1.49 and 2.51 µm, respectively. Floating IMC and voids within the solder bulk and IMC layer were also identified in the samples. In addition, the measured wetting angle for ENIG and ImSn were 16.21° and 34.32°, respectively.

ISSN 1511-3701

e-ISSN 2231-8542

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