Atmospheric Corrosion Tests on Pd/Ag Thick Film Conductors

Abstract

The influence of corrosive gases on the solderability of palladium/silver thick‐film conductors has been investigated. An experimental set‐up for atmospheric corrosion testing has been constructed in which atmospheres can be created comparable to a heavily polluted industrial environment. Various Pd/Ag thick‐film conductors have been submitted for 14 days to flowing atmospheres containing 1 ppm SO2, 15, 0·2 or 0·04 ppm H2S, 1 ppm NO2, 1 ppm O3 and 0·05 ppm Cl2, separately or in various combinations. When used separately, only H2S causes a poor solderability of the thick‐film conductors. This effect on the solderability turns out to be independent of the H2S concentration; even concentrations as low as 0·04 ppm cause identical corrosion phenomena. The other gases mixed with H2S have a synergistic effect on the corrosion process.

Citation

Hendriks, A.H.C. (1986), "Atmospheric Corrosion Tests on Pd/Ag Thick Film Conductors", Microelectronics International, Vol. 3 No. 3, pp. 69-71. https://doi.org/10.1108/eb044248