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Lead-free is defined as absence of a significant amount of lead (Chemical symbol Pb) in a package or part make-up. In an IC package, Pb is commonly found in the external lead finish or plating. In Chip Scale Packages (µCSP)/Wafer Level Packaging (WLP) and FlipChip, Pb may be found in the solder bumps.
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What is Maxim Integrated Products' definition of lead-free (Pb-free)?
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