Indium-lead-silver ribbon is good for soldering to gold because it minimizes gold leaching. It also has good thermal fatigue properties.
Alloy: 80In 15Pb 5Ag
Size: 1.00″ x .002″
Quantity: 1 ft Spool
Liquidus Melting Temperature: 154°C
Solidus Melting Temperature: 149°C
Pb-Free: No