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.
The material characteristics of 50μm Standard RA Copper Foil are developed through repeated cold rolling and controlled annealing. These processes help establish the required grain structure, ductility, and surface condition for subsequent forming, bending, and other downstream processing.
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: Copper purity is specified at ≥99.90%.
Initial State: Mill-hardened and precision-annealed before final processing.
Surface Condition: Degreased and passivated surface condition is available according to product requirements.
Performance Features
Electrical Conductivity: Electrical conductivity of ≥100% IACS supports efficient current transmission in electrical and electronic applications.
Ductility: A minimum elongation of 20% provides the flexibility required for bending, forming, and other downstream processing.
Dynamic Flexibility: The rolled annealed structure provides suitable flexibility for applications involving repeated bending, including flexible circuits and flat flexible cables.
Surface Quality: Controlled surface characteristics support consistent contact, lamination, coating, and shielding performance in downstream applications.
Technical Specifications
| Parameter | Standard Value | Test Standard |
|---|---|---|
| Nominal Thickness | 50 μm | IPC-TM-650 2.2.18 |
| Thickness Tolerance | ±2.0 μm | Micrometer / Online Gauge |
| Tensile Strength | ≥200 MPa | IPC-TM-650 2.4.18.1 |
| Elongation at Break | ≥20% | IPC-TM-650 2.4.18.1 |
| Electrical Conductivity | ≥100% IACS | ISO 2624 / Eddy Current Resistivi |
Manufacturing & Quality Control
Cold Rolling: Multi-pass cold rolling is used to progressively reduce the copper strip to the specified foil thickness while maintaining dimensional consistency.
Controlled Annealing: Intermediate and final annealing processes help develop the required recrystallized structure and maintain suitable ductility for downstream processing.
Surface Inspection: Surface quality is monitored during production to identify defects such as pinholes, scratches, and other surface irregularities that may affect subsequent processing.
Laboratory Verification: Finished foil is evaluated against specified requirements for thickness, tensile strength, elongation, electrical conductivity, and surface characteristics.
Applications
Flexible Printed Circuit Boards (FPC): Used in flexible circuit applications requiring good electrical conductivity, ductility, and resistance to repeated bending.
Battery Components: Suitable for selected lithium-ion battery components where copper foil with controlled thickness, conductivity, and mechanical properties is required.
EMI Shielding: Used as a conductive shielding layer in electronic equipment and components where effective electromagnetic interference protection is required.
Flat Flexible Cables (FFC): Suitable for flat flexible cable applications requiring conductive material that can be processed into thin, flexible cable structures.
Customization Options
Precision Slitting: Slit widths can be supplied within the available 20–600 mm width range according to application and processing requirements.
Surface Treatment: Optional surface treatment can be considered for applications requiring additional oxidation protection or specific surface characteristics.
Mechanical Properties: Rolling and annealing conditions can be adjusted according to specified requirements for bending, forming, and other downstream processing conditions.
Packaging & Delivery
Protective Packaging: Copper foil coils are packaged with moisture-resistant and impact-protection materials to help maintain product condition during storage and international transportation.
Oxidation Protection: Moisture-barrier packaging and desiccant can be used to reduce exposure to humidity and help protect the copper foil surface during transit.
Product Traceability: Product identification and quality documentation are provided according to order and lot requirements to support material traceability.
Technical Support
CIVEN Metal provides technical support for selecting and specifying rolled annealed copper foil according to application requirements. Product discussions can cover foil thickness, width, mechanical properties, surface characteristics, and downstream processing conditions such as bending, forming, lamination, and shielding.
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