Koki Company Limited

Motohide Sasaki

Takeshi Yahagi

Noriyoshi Uchida

Kazuhiro Yukikata

Tatsuya Baba

Yuri Misumi

Kazuma Karube

A flux according to the present invention includes a phosphine oxide. It is thereby possible to provide a flux capable of improving solder wettability, a resin flux cored solder including the flux, and a solder paste including the flux.

Flux, resin flux cored solder, and solder paste

A flux containing terpene phenolic resin and having an acid value of 120 mgKOH/g or more is provided. The acid value can be 250 mgKOH/g or less. The terpene phenolic resin can be contained by 0.05 mass % or more and 30 mass % or less. The flux can contain the terpene phenolic resin and another resin component as a rosin component, and an amount of the terpene phenolic resin contained in the rosin component can be 0.1 mass % or more and 80 mass % or less.

Flux and solder composition

Provided is a flux that contains at least one of an amine compound containing at least one acetylated amino group and an amino acid compound containing at least one acetylated amino group, as an activator.

Growing community of inventors

Tokyo, Japan

Motohide Sasaki