Flux composition and soldering method

摘要

Problem to be solved: to provide a flux composition and a soldering method using the flux composition which is excellent in solderability and is difficult to deposit the flux residue in the pallet mask and has excellent corrosion resistance to copper plate.Solution: (a) containing rosin resin, (b) activator, (c) solvent, and (d) chloreneic acid derivative.The first rosin resin having the aforementioned (a) component having a softening point of 120 ° C. or more (II)Contains at least one selected from the group consisting of hydrogenated rosin and disproportionated rosin, and a second rosin resin having a softening point of less thanFlux composition.No selection