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Ultraviolet radiation is always threatening our people's health, while the traditional clothes have not met the demands of resisting UV radiation. In this paper, we fabricated a new kind of silk coating with TiO2 nanoparticles. The obtained sample was characterized by SEM and XRD. Experimental UV spectra results show that this new kind of textile has an absorption peak at around 340 nm with magnitude...
RoHS Directive for environmental and health concerns have resulted in significant activities to find substitutes for lead-contained solders for microelectronics. The potential candidates such as Sn-Ag1 and Sn-Ag-Cu1 eutectic solders with melting temperatures of 221degC and 217degC, respectively are the most prominent solders because of their excellent mechanical properties as compared with that of...
As the world is changing to Pb-free solder per EU ROHS Directive, the higher reflow temperature requirement for Pb- free solder has demanded better substrate metal trace to solder mask adhesion to prevent delamination problem. Hence, selective Ni/Au plating process becomes more appealing in the fabrication of substrates to support Pb-free Semiconductor BGA product packaging. However, the set back...
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