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Indium can be used as a component in solder alloys used for bonding semiconductor chips to supporting substrates. It is desirable to treat the alloy surface with an inhibitor to prevent or reduce corrosion.
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Organic Inhibitors of Indium Corrosion
Indium can be used as a component in solder alloys used for bonding
semiconductor chips to supporting substrates. It is desirable to treat the alloy
surface with an inhibitor to prevent or reduce corrosion.
The following organic materials have been found effective for use with indium
lead alloys and other alloys which include a major proportion of indium. The
levels of inhibitor necessary is of the order of 100 parts per million under
conditions where the indium is submerged in an aqueous medium. o - tolyl
thiourea (OTT) 2 - mercaptobenzothiazole (2-MBT) n - octylsulfide (OS)