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

Table 2

Properties of eutectic Au-Si and Au-Ge solder alloys [58].

Solder	Properties
	ρ (kg·m^3)	σUTS (MPa)	Tm (°C)	CTE (RT-400°C) (10^−6·K^−1)
Pb-5Sn	10.8	36	314	28.4
Au-20Sn	14.51	338.3	280	15.9
Au-3Si	15.7	255	363	12.3
Au-12Ge	14.67	185	361	13.4