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- W2035234974 abstract "Due to environmental concerns, lead-free solders were introduced in replacing the lead-based solders in microelectronics devices technology. Although there are many lead-free solder available, the Sn-Ag-Cu is considered the best choice. But the solder has its draw backs in terms of melting temperature and intermetallic formations. To improve the solder, a fourth element Zn was added into the solder. The new composite solders were synthesized via powder metallurgy route. This research studies the effect of 0.1wt% Zn addition on the hardness and intermetallic formation on Cu substrate. For the hardness results, the micro Vickers values were reported. For intermetallic, the solders were melted at 250°C and aged at 150°C until 400 hours. The microhardness value for Zn based composites solder shows higher micro Vickers hardness compared to un-doped counterparts. The phases formed and its growth was studied under SEM and by energy dispensive x-ray (EDX). The SEM results show the presence of Cu 6 Sn 5 and Cu 3 Sn intermetallics and the Cu 5 Zn 8 intermetallic was not detected. The addition of 0.1wt% Zn has retarded the growth of the Cu 3 Sn intermetallic but not the total intermetallic thickness." @default.
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- W2035234974 date "2012-12-01" @default.
- W2035234974 modified "2023-10-05" @default.
- W2035234974 title "Intermetallic Evolution of Sn-3.5Ag-1.0Cu-0.1Zn/Cu Interface under Thermal Aging" @default.
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- W2035234974 doi "https://doi.org/10.4028/www.scientific.net/amr.620.142" @default.
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