COPPER PARTICLES AND METHOD FOR PRODUCING SAME

There are provided copper particles, in which a surface of a core particle consisting of metallic copper is coated with an organic protective film formed from an organic molecule derived from copper carboxylate, a total concentration of metal impurities having an oxidation reduction potential lower than that of copper is less than 10 ppm by mass, and an average particle diameter of the copper particles in a state where the copper particles are primary particles is more than 50 nm and 200 nm or less. When the copper particles are analyzed using a time-of-flight secondary ion mass spectrometry (TOF-SIMS), an amount of detected CuC2O2H− ions is in a range of 0.02 times or more with respect to an amount of detected Cu+ ions, and an amount of detected C2H3O2− ions is in a range of 0.02 times or more with respect to the amount of the detected Cu+ ions.