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Since the comfort feeling and satisfaction of a toilet seat is important for the defecation, we investigated the design parameters and affective attributes for toilet seats, and developed the affective model that explains the level of customer satisfaction. To achieve, objective measurements of design parameters and total 19 number of relevant affective attributes including appropriateness of each...
The benefits of using the low Ag solder in CSP package has been known in terms of the performance due to its intrinsic characteristic. In this study, SAC alloy dopanted D1 and D2 are selected to compare with the general solder alloy, SAC105, in terms of thermal fatigue fracture performance. The 0.5mm-pitch TFBGA packages on Halogen-free FR4 PCB treated with 150 C thermal aging at different period...
The benefits shown in the reliability performance when using the low Ag solder in BGA package has been known due to its intrinsic characteristic. In this study, SAC alloy with the dopant D1 and D2 respectively are selected to compare with the widely-used solder alloy, SAC105, from the perspective of the thermal fatigue fracture. The 0.5mm-pitch TFBGA packages on Halogen-free FR4 PCB pre-treated at...
In this paper, a new application of 4-point cyclic bending test for the solder joint reliability evaluation is discussed. In light of the long cycle time of thermal cycle testing, the industry has been searching for a more cost-effective and time-effective way to achieve the evaluation task. The 4-point cyclic bending test is considered a good candidate in this study. The thermal cycle test and 4-point...
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