Fine copper wire for electronic instruments and method of manufacturing the same

摘要

A fine copper wire for electronic instruments is disclosed which comprises 0.05 to 10 ppm in total amount of either one or not less than two kinds of Ti, Zr, V, Hf, Cr, Ca, Mg, Y and rare-earth elements, 1 to 30 ppm of oxygen and the remainder of Cu. A method of manufacturing therefor is described wherein the hot rolling is given to the ingot obtained by melting and casting in a nonoxidative atmosphere or in vacuum, then stretch processing and at least once or more times of intermediate annealing are repeated to finish to a fixed diameter of wire, and thereafter annealing is carried out under nonoxidative or reducible atmosphere to obtain desired mechanical characteristics.