The wetting interaction between electroless NiP deposit/Cu substrate and SnAg solder

Peishan Hsieh, Kwang-Lung Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Electroless NiP deposit has been frequently mentioned as the barrier laer for Cu substrate or metallization for the soldering process. The NiP deposit is solderable with many solders at appropriate temperature and operation condition. The present study attempted to investigate the wetting behavior of the Sn3Ag solder on the electroless NiP with wetting balance at 250°C and 270°C. The cross section of the wetting specimen was further investigated for the interaction and the interfacial microstructure between the solder and the NiP/Cu substrate. The interface was composed of Ni 3Sn 4 and Ni 3P compound layers. A Ni-Sn-P layer was detected between these two compound layers. The thickness of these layers was analyzed for the growth kinetics. The growth of these layers were found to follow an empirical power law log h(thickness) log k(constant) n log t(time). The variation in n values was discussed in relating to the growth mechanism of these two layers.

Original languageEnglish
Title of host publication2011 6th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2011
Pages29-32
Number of pages4
DOIs
Publication statusPublished - 2011
Event2011 6th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2011 - Taipei, Taiwan
Duration: 2011 Oct 182011 Oct 21

Other

Other2011 6th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2011
CountryTaiwan
CityTaipei
Period11-10-1811-10-21

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Hsieh, P., & Lin, K-L. (2011). The wetting interaction between electroless NiP deposit/Cu substrate and SnAg solder. In 2011 6th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2011 (pp. 29-32). [6117224] https://doi.org/10.1109/IMPACT.2011.6117224