12μm Standard RA Copper Foil

Base Material: High-purity cathode copper, specified as UNS C11000 / ETPI.

Copper Purity: Cu ≥99.95% according to the current material specification.

Grain Structure: Equiaxed recrystallized grain structure developed through controlled thermal-mechanical processing.

Flexibility and Ductility: The rolled-annealed grain structure provides the flexibility and elongation required for bending, forming, and other applications involving repeated mechanical movement.

Mechanical Strength: A tensile strength of at least 250 MPa, combined with elongation of at least 15%, provides a balance of strength and ductility for downstream handling and processing.

Controlled Surface Profile: Surface roughness of Rz ≤0.8μm on the shiny side and ≤1.5μm on the matte side supports consistent surface contact and processing in electronic material applications.

Electrical Conductivity: Electrical conductivity of ≥98% IACS provides the conductive performance required for thin copper foil used in electronic and shielding applications.

Thin-Gauge Construction: The 12μm nominal thickness provides a thin conductive layer for applications where reduced material thickness and space efficiency are important.

Melting and Casting: High-purity copper is processed through controlled melting and continuous casting to provide consistent feedstock for subsequent rolling.

Cold Rolling: Multi-pass cold rolling with automated gauge control is used to reduce the copper to the target 12μm thickness while maintaining a consistent thickness profile.

Continuous Annealing: Controlled-atmosphere annealing relieves internal stress and develops the recrystallized grain structure required for the flexibility and ductility of RA copper foil.

In-Line Inspection: Surface inspection is used to identify defects such as pinholes and scratches during production.

Laboratory Testing: Finished foil is evaluated for key properties including thickness, tensile strength, elongation, electrical conductivity, and surface roughness according to the applicable inspection methods.

Core Options: 12μm RA copper foil can be wound on polypropylene or steel cores with 3-inch or 6-inch inner diameters according to the roll and processing requirements.

Moisture Protection: Finished coils are vacuum-sealed in protective anti-static aluminum foil packaging with desiccant to help protect the copper surface during storage and transportation.

Transit Protection: Coils are secured in protective wooden crates to reduce the risk of edge damage and mechanical impact during handling and transportation.

Traceability: Master rolls can be identified by unique production codes linked to relevant material and quality records, supporting batch traceability and incoming inspection.

In-House Rolling Control: CIVEN Metal manages the rolling and annealing processes within its production system, providing direct control over reduction ratios, heat treatment, and material consistency.

Quality Documentation: Material and quality documentation, including COA and applicable compliance documentation, can be supplied with shipments to support incoming inspection and material verification.

Production Traceability: Production records and roll identification support batch-level traceability from material processing through finished copper foil.