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    National Tsing Hua University Institutional Repository > 工學院  > 化學工程學系 > 期刊論文 >  Interfacial reactions in the Sn-(Ag)/(Ni, V) couples and phase equilibria of the Sn-Ni-V system at the Sn-rich corner


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/39486


    Title: Interfacial reactions in the Sn-(Ag)/(Ni, V) couples and phase equilibria of the Sn-Ni-V system at the Sn-rich corner
    Authors: Chen, Chih-Chi;Chen, Sinn-Wen;Kao, Ching-Y A.
    教師: 陳信文
    Date: 2006
    Publisher: Springer Verlag
    Relation: JOURNAL OF ELECTRONIC MATERIALS, Springer Verlag, Volume 35, Issue 5, MAY 2006, Pages 922-928
    Keywords: Semiconducting tin compounds
    Microelectronics
    Reaction kinetics
    Phase equilibria
    Soldering
    Vanadium
    Isotherms
    Abstract: c2006 Springer - Ni-7wt.%V is commonly used as the barrier layer material in the under-bump metallurgy in the microelectronic industry. Although interfacial reactions between various solders with the nickel substrate have been investigated intensively, the effects of vanadium addition upon the solder/(Ni,V) interfacial reactions have not been studied. Sn/(Ni,V) and Sn-Ag/(Ni,V) interfacial reactions at 250°C were investigated in this study using the reaction couple technique. The vanadium contents of the (Ni,V) substrates examined in this study are 3 wt.%, 5 wt.%, 7 wt.%, and 12 wt.% and the reaction time is 12 h. The results indicate that when the vanadium contents in the (Ni,V) substrate are 5 wt.% and higher, the Sn/(Ni,V) and Sn-Ag/(Ni,V) interfacial reactions are different from those in the solder/Ni couples. Besides the Ni3Sn 4 phase as commonly formed in the reaction with Ni substrate, a new ternary T phase has been found, and the reaction path is L/Ni3Sn 4/T/(Ni,V). A 250°C Sn-Ni-V isothermal section is proposed based on the three constituent binary systems and limited experimental results obtained in this study. The reaction path is illustrated with the proposed Sn-Ni-V isothermal section. No stable ternary Sn-Ni-V phase is found from the phase equilibria study, and the new T phase is likely a metastable phase.
    URI: http://www.springerlink.com/
    http://nthur.lib.nthu.edu.tw/handle/987654321/39486
    Appears in Collections:[化學工程學系] 期刊論文

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