Name: China 25μm High-Precision RA Copper Foil Manufacturers Suppliers Factory - Civen Metal
Brand: Civen
SKU: 315507939

Civen Metal Material (Shanghai) Co., Ltd. is one of the leading manufacturers and suppliers of 25μm high-precision ra copper foil in China. Welcome to buy bulk durable 25μm high-precision ra copper foil made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.

This 25μm RA copper foil is produced through multi-pass cold rolling and controlled-atmosphere annealing. The process is designed to maintain consistent thickness, mechanical properties and surface condition across the supplied foil.

With a nominal thickness of 25μm and a thickness tolerance of ±0.8μm, the material is intended for applications where dimensional control is important. Its combination of tensile strength, elongation, surface roughness and electrical conductivity makes it suitable for flexible circuits, current-collector components, electromagnetic shielding and other precision conductive applications.

Material & Performance

High-Purity Copper

The base material is high-purity electrolytic copper. The current specification lists C11000 / C10200 series copper with a copper content of ≥99.99%.

Controlled Thickness

The nominal thickness is 25μm, with a specified thickness tolerance of ±0.8μm.

Mechanical Properties

The typical tensile strength is 380 MPa in the annealed condition, with elongation of approximately 22%. Actual mechanical properties can vary with the selected temper and material condition.

Surface Characteristics

The matte-side surface roughness is specified at Rz ≤1.2μm. Controlled surface characteristics support subsequent processing where consistent foil surfaces are required.

Technical Specifications

Nominal Thickness：25μm

Thickness Tolerance ：±0.8μm

Density： 8.96 g/cm³

Tensile Strength：380 MPa, annealed condition

Elongation：22%

Surface Roughness：Rz ≤1.2μm, matte side

Electrical Resistivity ：≤0.01724 Ω·mm²/m at 20°C

Standard Width：100–620 mm, slittable

For applications requiring a different thickness, 18μm High-Precision RA Copper Foil and 35μm High-Precision RA Copper Foil are available within the same high-precision RA copper foil range.

Applications

Flexible Circuits

The 25μm thickness is suitable for flexible printed circuit applications where controlled foil thickness and mechanical flexibility are required.

Battery Components

The foil can be used for selected current-collector applications where electrical conductivity, dimensional control and mechanical properties are important.

Electromagnetic Shielding

Copper foil can be processed into conductive shielding layers for electronic equipment and other applications requiring electromagnetic protection.

Precision Electronic Components

The material is suitable for sensors, flexible conductive components and other electronic applications that require a thin copper layer with controlled dimensional and surface characteristics.

Supply & Processing Options

Width: Standard widths are available within the 100–620 mm range, with slitting options according to the required finished width.

Surface: Surface condition can be discussed according to the requirements of subsequent lamination, etching or other processing.

Temper: Mechanical properties can vary according to the selected temper and annealing condition.

Core: Core requirements can be confirmed according to coil width, handling equipment and downstream processing requirements.

For custom specifications, please provide the required thickness, width, temper, surface condition and application when requesting a quotation.

Manufacturing & Quality Control

The foil is produced through controlled casting, multi-stage cold rolling and annealing processes. Thickness and surface condition are monitored during production, while mechanical and electrical properties are checked to maintain consistency of the supplied material.

Quality checks include dimensional inspection, tensile testing and electrical resistivity testing according to the applicable material specifications and test methods.

Packaging

Copper foil rolls are protected against moisture and corrosion during storage and transportation. Packaging, core requirements and shipping protection can be confirmed according to the order specification and destination.

For customers requiring material traceability or test documentation, the required documentation can be discussed before shipment.

FAQ

Q: What is 25μm High-Precision RA Copper Foil?

A: It is a 25μm rolled-annealed copper foil designed for applications requiring controlled thickness, electrical conductivity, flexibility and consistent surface characteristics.

Q: What is the thickness tolerance?

A: The specified thickness tolerance is ±0.8μm for the 25μm nominal thickness.

Q: What are the main applications?

A: Typical applications include flexible printed circuits, selected battery current-collector applications, electromagnetic shielding and precision electronic components.

Q: What is the tensile strength of the foil?

A: The current product specification lists a typical tensile strength of 380 MPa in the annealed condition, with elongation of 22%.

Q: What width can be supplied?

A: The current specification lists a standard width range of 100–620 mm, with slitting options available according to the required finished width.

Q: Can the foil be supplied with different processing or surface requirements?

A: Processing requirements such as finished width, surface condition, temper and core specification can be discussed according to the customer's downstream process.

Q: What information should I provide when requesting a quotation?

A: Please provide the required thickness, width, quantity, temper or mechanical requirements, surface requirements, core specification and intended application. If the foil will be used for a specific lamination, etching or forming process, related process requirements are also useful for material selection.