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Do the printed wiring boards have to be lead-free?

April 26, 2017Lead-Free printed wiring

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Do the printed wiring boards have to be lead-free?

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Estimates are that 60-70% of printed wiring boards are tin-lead solder coated, usually by hot air solder leveling (HASL). The solder coatings are applied to the copper surfaces of the printed wiring board to preserve solderability and protect the copper conductors from environmental corrosion. To comply with European Restriction of Hazardous Substances (RoHS) Directive 2002/95/EC, tin-lead solder cannot be used.