Patent ID: 8216442

Claim:
A manufacturing method of ultrahigh purity copper, wherein, upon subjecting copper to high purification with an electrolytic method, an electrolytic bath is partitioned with an anion exchange membrane to form an anode side and a cathode side of the electrolytic bath, anolyte is intermittently extracted from the anode side and introduced into an active carbon treatment vessel, chlorine ions are added to the extracted anolyte in the active carbon treatment vessel, and subsequently active carbon is poured into the extracted anolyte and the extracted anolyte with active carbon is agitated so as to adsorb impurities, after the chlorine ions are added to the extracted anolyte and the active carbon is poured into the extracted anolyte and agitated, the impurities are removed together along with the active carbon by filtration, and an obtained high purity copper electrolytic solution is intermittently or continuously introduced into the cathode side and electrolyzed, wherein the ultrahigh purity copper produced by the manufacturing method has a residual resistance ratio of 38,000 or greater and a purity, when calculated without respect to gas components of O, C, N, H, S and P, of 8N or higher.