Table 2 Wetting angles before and after reflow process for different surfaces
Process | Reflow cycles | Wetting angle [°] | Wetting angle after ageing at 155 °C for 4 h [°] |
---|---|---|---|
Established metallic surface finishes | 0 | 15 | 20 |
1 | 25 | 30 | |
2 | 30 | 35 | |
3 | 45 | 50 | |
4 | 60 | 70 | |
Organic metal/silver nanoparticle finish | 0 | 15–20 | 25–30 |
1 | 20–25 | 25–30 | |
2 | 25–30 | 25–30 | |
3 | 20–30 | 30–35 | |
4 | 30–35 | 30–40 |