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In this paper, we demonstrate that through normal dispenser machines, white light-emitting diodes (wLEDs) with good angular-color uniformity can be obtained with the use of ZnO nanoparticles (NPs). A $\Delta $ CCT of 148 K at a correlated color temperature (CCT) level of 6000 K in the angle range of −90° to 90° can be realized by mixing ZnO-QD2 NPs ($r=5$ nm) at a concentration of 3 wt% with the...
Optimizing the elelctroplating condition, the thickness of a Pd layer in the Au/Pd/Ni/Cu pre-plated leadframe (PPF) is reduced to 8 -10 nm. Introducing a ~10 nm thick dense (Cu,Ni)3Sn intermetallic compound (IMC) layer in the PPF drastically reduces Cu out-diffusion and hence improves significantly the protection of the leadframes against oxidation and corrosion attack. The microstructural characterization...
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