Corrosion of In-Base Solders
- 1 April 1978
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 07350791,p. 200-206
- https://doi.org/10.1109/irps.1978.362846
Abstract
Aqueous corrosion of In-base solders attached to Au conductors was studied by metallurgical analyses and galvanic cell tests. It was found that the solders, 90 In-10 Ag, 50 In-50 Pb, 70 In-30 Pb and 50 In-50 Sn, when coupled to Au, became susceptible to galvanic corrosion attack in solutions with pH < 4. The node of corrosion attack and corrosion products were investigated by SEM, microprobe, and x-ray diffraction analyses. Ways to avert the problem are also discussed.Keywords
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