35μm Standard RA Copper Foil

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

Controlled Surface Profile: Consistent surface characteristics support downstream processes such as lamination, etching, and bonding.

Mechanical Balance: The material combines tensile strength with elongation to provide stable handling during processing while maintaining the flexibility expected from RA copper foil.

Thickness Consistency: A controlled rolling and annealing process helps maintain consistent foil thickness across the specified width.

Surface Condition: A controlled surface condition supports reliable contact and bonding in electronic material applications.

Melting & Casting: Copper is prepared through controlled melting and casting to provide a consistent material base for subsequent rolling and annealing processes.

Precision Cold Rolling: Multi-pass cold rolling is used to control foil thickness and develop the required mechanical properties. Process parameters are monitored throughout production to maintain consistent thickness across the coil.

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

In-Line Inspection: Surface condition and dimensional characteristics are monitored during production to identify pinholes, surface defects, and other abnormalities before the finished foil is released.

Quality Verification: Finished material is tested for key properties such as thickness, tensile strength, elongation, copper purity, surface roughness, and electrical conductivity according to the applicable test methods.

Batch Documentation: Quality records are maintained for each production batch, with inspection results available for customer review and shipment documentation.

The 35μm Standard RA Copper Foil is suitable for electronic components and assemblies where controlled thickness, electrical conductivity, and flexibility are important to material selection.

Flexible Printed Circuits (FPCs)
Used as a conductive layer in flexible circuit structures where the copper foil needs to withstand bending and downstream forming processes.

Shielding Materials
Suitable for electromagnetic shielding structures that require a conductive copper layer with consistent thickness and surface characteristics.

Flexible Flat Cables (FFCs)
Can be used as a conductive material in flexible flat cable structures where electrical conductivity and mechanical flexibility are required.

Battery Components
Applicable to selected battery-related components and conductive structures where copper foil thickness, conductivity, and formability meet the requirements of the specific design.

Standard 35μm RA copper foil can be prepared according to the dimensional and processing requirements of the intended application. When requesting a quotation, buyers can provide the required width, coil configuration, core specification, surface treatment, and other relevant processing requirements for confirmation.

Slitting：The master coil can be slit into narrower widths according to the required finished dimensions and downstream processing requirements.

Surface Treatments：Additional surface treatments can be discussed for applications requiring specific bonding, corrosion resistance, oxidation protection, or other surface characteristics. For applications where the surface condition is an important part of material selection, Treated RA Copper Foil is another option to consider.

Core Options：Core dimensions and winding configurations can be confirmed according to the customer's equipment, handling requirements, and finished coil dimensions.

Sampling：Samples can be arranged for material evaluation and process testing before regular production. Sample requirements should include the intended application, required dimensions, and any specific surface or mechanical requirements.

Direct Mill Operation：Direct manufacturing access supports communication on material specifications, processing requirements, and production arrangements without relying solely on third-party sourcing.

Material Traceability：Production and inspection records provide traceability for finished material and help support quality review throughout the supply process.

Consistent Gauge Control：Controlled rolling and inspection processes help maintain the specified foil thickness and material properties from coil to coil.