METHOD FOR MANUFACTURING SOLDER PRODUCT, SOLDER, SOLDERED COMPONENT, PRINTED WIRING BOARD, PRINTED CIRCUIT BOARD, WIRE, SOLDERED PRODUCT, FLEXIBLE PRINTED BOARD, ELECTRONIC COMPONENT, METHOD FOR MANUFACTURING TIN ARTICLE, METHOD FOR MANUFACTURING TIN INTERMEDIATE PRODUCT, TIN INTERMEDIATE PRODUCT, AND CONDUCTIVE MEMBER

摘要

A solder product 20 includes: a lead-free solder part 21 containing tin as a main component and a metal element other than lead as a secondary component; and a carboxylic acid having 10 to 20 carbons, the carboxylic acid being mainly distributed over the surface of the solder product 20 to form a surface layer 22. The carboxylic acid is preferably a fatty acid having 12 to 16 carbons, and more preferably a palmitic acid.