FLUX FOR RESIN FLUX CORED SOLDER, RESIN FLUX CORED SOLDER, FLUX FOR FLUX-COATED SOLDER, FLUX-COATED SOLDER, AND SOLDERING METHOD

摘要

Provided are flux for resin flux cored solder, flux for flux-coated solder, resin flux cored solder using the flux for resin flux cored solder, flux-coated solder using the flux for flux-coated solder, and a soldering method, which have low residue and are excellent in processability. The flux for resin flux cored solder or flux-coated solder contains a solid solvent in an amount of 70 wt% or more and 99.5 wt% or less, and an activator in an amount of 0.5 wt% or more and 30 wt% or less. In addition, the flux contains a phenol-based solid solvent in an amount of 70 wt% or more and 100 wt% or less, and an activator in an amount of 0 wt% or more and 30 wt% or less. Additionally, the flux contains a phenol-based solid solvent in an amount of more than 0 wt% and 30 wt% or less, a solid solvent other than the phenol-based solid solvent in an amount of 70 wt% or more and 99.5 wt% or less, and an activator in an amount of 0 wt% or more and 30 wt% or less.