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What is Maxims definition of lead-free (Pb-free)?

April 26, 2017definition Lead-Free Maxim Pb-free

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What is Maxims definition of lead-free (Pb-free)?

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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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Lead-free is defined as the non-intentional use of lead (Chemical symbol Pb) and less than 1000ppm in a homogeneous material. 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.