从China供应商批发进口6n Copper Pellets — FOB条款

6N copper pellets from Cowin Semiconductor Materials are refined to 99.9999 percent purity (Cu 99.9999%), with the source listing also citing 99.999999 percent purity. These custom-sized pellets serve semiconductor fabrication, sputtering target production, and high-end electrical component manufacturing where trace impurities compromise device performance. The material originates from Ningbo, Zhejiang Province, and is vacuum-packed or sealed in drums to prevent oxidation and atmospheric contamination during transit.

The pellets conform to 6N grade (six-nines) copper standards, meaning total metallic impurities are controlled below 1 ppm. Typical applications demand strict limits on sulfur, oxygen, and transition metals that would alter electrical resistivity or cause voids in thin-film deposition. Cowin offers customized sizing rather than fixed diameters, allowing buyers to match feedstock dimensions to their vacuum melting or pressing equipment. Standard industry practice requires certificates of analysis for each lot, detailing glow discharge mass spectrometry (GDMS) or inductively coupled plasma (ICP) results for individual impurity elements.

Buyers for this product include semiconductor wafer foundries, thin-film solar cell manufacturers, and producers of high-purity copper alloys for aerospace connectors. The supplier's Harbor trust tier indicates basic verification, though the zero percent response rate and zero average response hours mean live communication should be tested before committing to orders. Importers typically request Incoterms clarification, lead time confirmation, and lot-specific assay reports, none of which are specified in the available data.

Cowin Semiconductor Materials (Ningbo) Co., Ltd. operates from No.22 Boxuan Road in Hangzhou Bay, Ningbo City, Zhejiang Province, postal code 315336. The company holds a Harbor trust tier on the marketplace, which represents entry-level verification rather than audited certification. No response data exists for this supplier, with both response rate and average response hours showing zero, so buyers should initiate contact to assess communication reliability before placing orders.

The listing presents Cowin as a source of certified 6N copper pellets for international trade, though no specific certifications, production capacity, or client references are provided. The supplier's product focus centers on ultra-high-purity copper materials for electronics and advanced manufacturing sectors. Buyers should verify whether Cowin provides lot traceability, material safety data sheets, and conflict mineral statements, as these are standard requirements for semiconductor supply chains but are not confirmed in the available profile.