Civen Metal Material (Shanghai) Co., Ltd. is one of the leading manufacturers and suppliers of 12μm standard ra copper foil in China. Welcome to buy bulk durable 12μm standard ra copper foil made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
12um Standard Rolled-Annealed (RA) Copper Foil is manufactured via precision cold rolling and intermediate annealing, designed for dynamic flexing and high-reliability electronic applications. Unlike electrodeposited foil, RA foil features a multi-directional grain structure that withstands repeated mechanical stress without micro-cracking.
Key Material
Base Material: High-purity cathode copper (Cu >= 99.95%, UNS C11000 / ETPI).
Inclusions & Purity: Oxygen-free raw material preventing gas pockets and maintaining uniform electrical conductivity.
Grain Structure: Equiaxed recrystallized orientation achieved via controlled thermal-mechanical processing.
Performance Features
Dynamic Flexibility: Resists conductor fatigue under tight bending radii.
Uniform Profile: Controls cross-web thickness variation for stable electrical impedance.
Fine-Line Etching: Low surface roughness supports high-density circuit trace formation.
Thermal Resistance: Maintains structural integrity during multi-layer lamination up to 200C.
Technical Specifications
|
Parameter |
Specification Value |
Test Standard |
|
Nominal Thickness |
12um (0.012mm) |
IPC-TM-650 2.2.18 |
|
Thickness Tolerance |
+/- 0.8um |
IPC-TM-650 2.2.18 |
|
Tensile Strength |
>= 250MPa |
IPC-TM-650 2.4.18 |
|
Elongation |
>= 15% |
IPC-TM-650 2.4.18 |
|
Electrical Conductivity |
>= 98% IACS |
ASTM B193 |
|
Surface Roughness (Rz) |
Shiny Side <= 0.8um / Matte Side <= 1.5um |
ISO 4287 |
|
Standard Width |
100mm - 1290mm (Slit to order) |
Direct Measurement |
Manufacturing & Quality Control
Melting & Casting: Vacuum induction melting and continuous casting of high-purity billets.
Cold Rolling: Tandem multi-high rolling mills with automated gauge control (AGC) for micron-level accuracy.
Annealing: Continuous strand furnaces with protective nitrogen-hydrogen atmospheres.
Inline Inspection: 100% optical surface scanning detecting pinholes and scratches.
Laboratory Testing: Tensile testers, atomic absorption spectrometers, and laser profilometers.
Applications
Flexible Printed Circuit Boards (FPCs)
Hinge areas in foldable devices, smartphone mainboards, and automotive sensors.
Lithium-Ion Batteries
Current collectors for high-density pouch cells.
Shielding
EMI shielding tapes, gaskets, and flat transmission cables.
Customization & OEM Supply
Slitting
Widths from 10mm to 1290mm with edge burr height <= 5% of foil thickness.
Surface Treatment
Anti-tarnish passivation applied upon request to extend shelf life against oxidation.
Carrier Configuration
Available in self-supporting master rolls or laminated temporary carrier setups.
Packaging & Delivery
Core: Wound on polypropylene or steel cores (3-inch or 6-inch inner diameter).
Moisture Barrier: Vacuum-sealed in anti-static aluminum foil bags with desiccants.
Crating: Suspended inside fumigation-free wooden crates to prevent edge damage and transit shock.
Traceability: Master rolls labeled with unique QR codes linked to heat numbers, rolling logs, and COA reports.
Why CIVEN Metal
In-House Rolling Facilities: Direct control over reduction ratios and annealing schedules ensuring batch consistency.
Documentation: Full MSDS, COA, and third-party RoHS/REACH compliance reports supplied with shipments.
Supply Capacity: Monthly output exceeding 150 tons backed by buffer stock for standard widths.
FAQ
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