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Indium Alloys for Soldering to Gold

Here is a question that was received and answered on our website almost a decade ago – but it is still quite relevant:

“I have an application where I need to solder to 0.5µm thick gold. What alternatives do I have? What alloys are likely to work?”

“Being that your gold is relatively thin, you really do not have any limitations as far as [indium-based solder] materials go. You should consider the temperature that the solder will see and try to choose an alloy that melts at least 40°-50°C higher. You should also consider the sort of mechanical strength that you will need.”

Here is a list of solder alloys we offer, including indium based alloys: Indalloy Chart

CONTACT ME if you have any further questions:

Jim Hisert
Applications Engineer
Ph: +1.315.853.4900 x7592