Civen Metal Material (Shanghai) Co., Ltd. is one of the leading manufacturers and suppliers of 50μm standard ra copper foil in China. Welcome to buy bulk durable 50μm standard ra copper foil made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
Industrial-grade rolled-annealed copper foil designed for dynamic bending applications, flexible printed circuits, and specialized shielding components. Produced via multi-pass cold rolling and controlled atmosphere annealing under ISO 9001 and IATF 16949 certified quality management systems.
Product Overview
Manufactured from high-purity electrolytic copper cathodes (Cu-ETP / UNS C11000, min. 99.90%). Mechanical rolling aligns the grain structure along the rolling direction, yielding high fatigue resistance and uniform thickness across widths up to 600 mm. Supplied in master rolls or custom-slit widths on standard 3-inch or 6-inch cores.
Key Material
Alloy Grade
Cu-ETP (CW004A / C11000) or Oxygen-Free Copper Cu-OF (CW008A / C10200).
Purity
≥ 99.90%.
Initial State
Mill-hardened and precision-annealed.
Surface Condition
Degreased, oxide-free, and passivated.
Performance Features
Dynamic Flexibility: Extended bending life cycles under repeated mechanical motion compared to ED copper foil.
Conductivity: Electrical conductivity ≥ 100% IACS at 20 °C.
Thickness Uniformity: Tolerance controlled within ± 5% across coil width.
Surface Finish: Low-profile matte and shiny sides (Rz ≤ 1.5 μm).
Thermal Stability: Recrystallization temperature > 250 °C.
Technical Specifications
|
Parameter |
Standard Value / Range |
Test Standard |
|
Nominal Thickness |
50 μm |
IPC-TM-650 2.2.18 |
|
Thickness Tolerance |
± 1.0 μm |
Micrometer / Beta Ray Gauge |
|
Tensile Strength |
200 – 260 MPa (Soft Annealed State) |
ASTM E8 / EN 10002 |
|
Elongation at Break |
≥ 20% |
ASTM E8 |
|
Electrical Conductivity |
≥ 100% IACS |
ISO 2624 |
|
Surface Roughness (Rz) |
≤ 1.5 μm |
ISO 4287 |
|
Standard Width Range |
10 mm – 600 mm |
Slitting Tolerance ± 0.1 mm |
|
Core Inner Diameter |
76 mm (3 inch) / 152 mm (6 inch) |
Industrial Standard |
Manufacturing & Quality Control
Rolling & Annealing: Multi-high reversible cold rolling mills with automatic gauge control (AGC) and continuous strand hydrogen-nitrogen annealing lines.
Slitting: Rotary shear and razor slitting with edge burr height < 10% of foil thickness.
Inspection: Online laser thickness gauging, eddy current pinhole testing, and lot-based tensile/elongation testing.
Traceability: Laser-labeled master coils linked to batch-specific Material Test Certificates (MTC).
Applications
Flexible Printed Circuits (FPCs): Folding display hinges, automotive dashboards, and medical probes.
Lithium-ion Batteries: Current collector substrates and conductive tabs.
Electromagnetic Shielding: EMI/RFI shielding tapes and cable wraps.
Flat Flexible Cables (FFC): Industrial automation signal lines.
Customization & OEM Supply
Thickness Range
12 μm to 105 μm.
Slitting Tolerance
Widths customized to strict specifications.
Surface Treatments
Optional chromate or organic anti-tarnish passivation and mechanical roughening.
Trial Samples
5 kg to 20 kg sample rolls available for R&D evaluation.
Packaging & Delivery
Inner Layer: VCI anti-corrosion paper and vacuum-sealed moisture-barrier bags with desiccants.
Outer Protection: ISPM 15 compliant wooden crating with edge reinforcement and suspension bracing.
Why CIVEN Metal
Mill-Direct Control: Complete internal processing from cold rolling to precision slitting.
Verified Compliance: Lot-specific MTCs supplied with every shipment conforming to ASTM, IPC, and ISO standards.
Stable Output: Multi-line production capacity ensuring continuous long-term contract supply.
Technical Partnership: Direct access to metallurgical engineers for alloy and specification optimization.
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