16 Processing and Reliability of Solder Interconnections …
509
Fig. 16.15 (continued)
100% SAC305: η = 2030 ± 90 cycles; β = 7.1 ± 1.4
No conformal coating
Sn–Pb/SAC305: η = 2570 ± 120 cycles; β = 8.5 ± 2.2
Conformal coating
Sn–Pb/SAC305: η = 2660 ± 90 cycles; β = 8.6 ± 1.9
No conformal coating
The conformal coating increased the slope (β) of the 100%SAC305 joints,
indicating an decrease to the spread of cycles to failure. The coating had little effect
on the β belonging to the mixed Sn-Pb/SAC305 interconnections.
509
Fig. 16.15 (continued)
100% SAC305: η = 2030 ± 90 cycles; β = 7.1 ± 1.4
No conformal coating
Sn–Pb/SAC305: η = 2570 ± 120 cycles; β = 8.5 ± 2.2
Conformal coating
Sn–Pb/SAC305: η = 2660 ± 90 cycles; β = 8.6 ± 1.9
No conformal coating
The conformal coating increased the slope (β) of the 100%SAC305 joints,
indicating an decrease to the spread of cycles to failure. The coating had little effect
on the β belonging to the mixed Sn-Pb/SAC305 interconnections.