Novel Au-Based Solder Alloys: A Potential Answer for Electrical Packaging Problem

Table 4

Au-Ag-based medium-temperature solders [70].

Alloy	Composition (at.%)				Solidus (°C)	Liquidus (°C)	ΔT (°C)
	Au	Ag	Si	Ge
Au-Ag-Si	86.72	10.02	3.26	—	409	450	41
	86.63	10.12	3.25	—	411	451	40
	82.70	14.02	3.28	—	421	457	36
	78.25	18.47	3.27	—	448	499	51
	78.30	18.50	3.20	—	449	478	29
	78.22	18.55	3.13	—	448	481	33
Au-Ag-Ge	58.5	19.5	—	22.0	410	449.8	39.8
	60.0	15.0	—	25.0	401.1	441	39.9
	67.95	19.25	—	12.80	446.76	494.4	47.64
	77.32	12.62	—	10.06	405	431	26
Au-Ag-Si-Ge	74.9	20.1	2.5	2.5	451.36	506.49	55.13