WATER-DISPERSED FLUX COMPOSITION, ELECTRONIC CIRCUIT BOARD WITH ELECTRONIC COMPONENT, AND THEIR PRODUCTION METHODS

摘要

Disclosed is a water-dispersed flux composition containing solid fine particles containing a carboxyl group-containing resin, an activator, a dispersing agent and water. All the solid fine particles have a particle diameter of 0.03-20 µm, and the ratio of solid fine particles having a particle diameter of 0.03-10 µm is not less than 90% by mass relative to the total of solid fine particles (100% by mass).