FLUX FOR LEAD-FREE SOLDER, LEAD-FREE SOLDER PASTE AND LEAD-FREE WIRE SOLDER

摘要

PROBLEM TO BE SOLVED: To provide a flux composition having satisfactory wettability, and in which cracks are hard to be generated on flux residue.SOLUTION: A flux for lead-free solder including dimer acid dialkyl ester (A) is used. The flux further includes rosins (B): an activator (C); a thixotropic agent (D); a solvent for a flux (E); and an antioxidant (F).