Civen Metal Material (Shanghai) Co., Ltd. is one of the leading manufacturers and suppliers of 18μm high-precision ra copper foil in China. Welcome to buy bulk durable 18μm 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.
CIVEN Metal 18μm High-Precision RA Copper Foil is produced through multi-pass cold rolling and controlled-atmosphere annealing. The process is used to maintain consistent thickness, mechanical properties and surface characteristics across the supplied foil.
The material is based on electrolytic tough pitch copper or oxygen-free electronic copper, depending on the specified material grade. Its combination of thin-gauge construction, tensile strength, elongation and electrical conductivity makes it suitable for applications where dimensional control and flexibility are important.
For a broader range of rolled copper foil specifications, see RA Copper Foil for additional thickness and material options.
Material & Performance
Copper Material
The current specification includes Electrolytic Tough Pitch Copper (C11000) and Oxygen-Free Electronic Copper (C10100 / C10200), with copper purity of ≥99.95%.
Controlled Thickness
The nominal thickness is 18μm, with a specified thickness tolerance of ±0.5μm.
Mechanical Properties
The annealed specification lists a tensile strength of 320–420 MPa and elongation of ≥18%. These properties support applications requiring a combination of thin-gauge construction and mechanical flexibility.
Electrical Conductivity
Electrical conductivity is specified at ≥100% IACS at 20°C, supporting conductive applications where low electrical resistance is required.
Surface Characteristics
Surface roughness is specified at Rz ≤0.8μm on the shiny side and Rz ≤1.2μm on the matte side.
Technical Specifications
Nominal Thickness：18μm
Thickness Tolerance：±0.5μm
Base Material：C11000 / C10100 / C10200
Copper Purity ：≥99.95%
Tensile Strength：320–420 MPa, annealed
Elongation ：≥18%
Electrical Conductivity ：≥100% IACS at 20°C
Surface Roughness (Rz) Shiny side ≤0.8μm; matte side ≤1.2μm
Roll Width：10–620 mm, customizable
Core Inner Diameter 76 mm / 152 mm
The exact material grade, temper, width and core specification can be confirmed according to the customer's processing and equipment requirements.
Manufacturing & Quality Control
Rolling: Multi-high precision reversing mills integrated with automatic gauge control (AGC).
Annealing: Continuous roller-hearth furnaces under oxygen-free hydrogen-nitrogen atmospheres.
Surface Treatment: Inline chemical cleaning and passivation to remove residual oils and inhibit oxidation.
Inspection: 100% online pinhole scanning, laser width/thickness profiling, and destructive universal mechanical testing per lot.
Applications
Flexible Printed Circuits
18μm RA copper foil can be used as a conductive layer in flexible printed circuit applications where thin foil and mechanical flexibility are required.
Battery Components
The foil is suitable for selected lithium-ion battery current-collector applications, including applications requiring thin copper foil for high-rate cell designs.
Electromagnetic Shielding
Copper foil can be processed into conductive shielding tapes, laminates and other components used for electromagnetic or radio-frequency shielding.
Precision Electronic Components
The material can also be considered for sensors, flexible conductive components and other electronic applications requiring thin copper foil with controlled mechanical and electrical properties.
Supply & Processing Options
Width: Roll widths from 10–620 mm are listed in the current specification. Custom finished widths can be discussed according to the required application.
Surface: Shiny-side and matte-side surface characteristics are controlled according to the specified roughness requirements. Additional surface treatment can be discussed where required by the downstream process.
Temper: Temper selection can be discussed according to forming, bending and lamination requirements.
Core: 76 mm and 152 mm core inner diameters are listed in the current specification. Other requirements should be confirmed before production.
For quotation, please provide the required thickness, width, quantity, material grade, temper, surface requirements and intended application.
Manufacturing & Quality Control
The foil is produced through multi-pass cold rolling and controlled-atmosphere annealing. Automatic gauge control and production inspection are used to monitor dimensional and surface characteristics during processing.
Quality checks include thickness, width, mechanical properties, electrical conductivity and surface roughness according to the applicable material specifications and test methods.
Packaging
Copper foil rolls are protected against moisture and corrosion during storage and transportation. Packaging and core requirements can be confirmed according to the order specification and shipping conditions.
For customers requiring material traceability or test documentation, documentation requirements can be discussed before shipment.
FAQ
Related Thickness Options
For a thicker option within the same high-precision RA copper foil range, see 25μm High-Precision RA Copper Foil.
For other thin-gauge options, the current product range also includes 12μm and 9μm High-Precision RA Copper Foil.
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