On July 20, China's leading high-purity copper technology company: NBJX Advanced Materials Technology Group's first phase of large-size high-purity copper production line with an annual output of 600 tons was completed and put into operation. The large-scale production of large-scale high-purity copper has broken the foreign monopoly on high-purity copper raw materials in the fields of integrated circuits and superconductors. It has broken through the technical bottleneck in the subdivision of key industries and has independent intellectual property rights of production technology. To meet the country’s major industrial needs, it has important technical and economic value.
High-purity copper refers to metallic copper with a purity above 5N (Cu≥99.999%). As an emerging material, high-purity copper is mainly used in high-tech fields such as integrated circuits, flat panel displays, superconductors, quantum and high-quality audio lines, ion plating, and high-purity alloy smelting. At present, the industry's high-end high-purity copper is almost monopolized by several large foreign multinational companies, such as Wieland and Nikkei. China's high-purity copper is basically dependent on imports, which severely restricts the development of related industries in China.
NBJX and the team of Professor Wang from Tsinghua University have jointly developed and successfully realized the mass production of 5N high-purity copper and 6N high-purity copper. The production of large-size copper ingots exceeds 600 kg, and the maximum can reach 1 ton. Rods, tubes, plates and other products. Certified by an authoritative testing organization: the purity of 5N high-purity copper is not less than 99.999%, the content of C, H, N, O, and S is less than 3ppm; the purity of 6N high-purity copper is not less than 99.99997%, and the purity of C, H, N, O, S is not less than The content is less than 1ppm.