Double-Side Treated RA Copper Foil

Base Material: Oxygen-free copper (Cu >= 99.99%, C11000 or C10200 equivalents).
Treatment Layer: Electro-deposited micro-nodules (copper-cobalt-nickel alloy or proprietary barrier layer) applied to both sides to inhibit copper migration and improve peel strength.
Microstructure: Recrystallized grain structure oriented along the (200) and (220) planes, engineered to resist fatigue fracture under continuous dynamic bending. 

Dual-Side Adhesion: Dual-face micro-roughened morphology achieves peel strength >= 0.7 N/mm with polyimide films in multi-layer stack-ups.

Dynamic Flex Resistance: Withstands over 150,000 cycles in MIT folding endurance tests without matrix micro-cracking.

Etching Uniformity: Controlled treatment depth prevents undercutting during fine-line patterning (L/S <= 15 um).

Thermal Stability: Withstands sequential lamination cycles up to 280 deg C for 30 minutes without bond degradation.

Rolling Mills: Multi-high cold rolling reduction stands with thickness gauge feedback control maintaining cross-web variance under 2%.

Annealing Furnaces: Controlled hydrogen-nitrogen protective atmosphere lines operating at precise recrystallization temperatures to eliminate residual stress.

Treatment Lines: Horizontal dual-side surface deposition tanks applying uniform barrier layers with inline current density monitoring.

Inspection: 100% automated optical inspection (AOI) for pinholes and edge cracks, supplemented by destructive peel and tensile testing per ASTM/IPC standards on every master roll.

Multi-Layer FPCs: Inner and outer conductor layers requiring dual-face dielectric bonding.

High-Frequency Lines: 5G antenna modules and millimeter-wave cables requiring stable impedance and low insertion loss.

Rigid-Flex Transitions: Dynamic bend zones in aerospace, medical probes, and folding hinges.

Automotive Harnesses: Under-hood camera and LiDAR interconnects exposed to continuous vibration and thermal stress.

Thickness Variants: Custom rolling from 9 um up to 70 um.
Width Capabilities: Slitting down to minimum widths of 10 mm with laser-guided edge trimming (+/- 0.1 mm tolerance).
Surface Profiles: Tailored treatment roughness matching specific epoxy, acrylic, or thermoplastic polyimide adhesive systems.
Core Options: Supplied on 3-inch or 6-inch plastic or paper cores with protective outer wrapping. 

Inner Packaging: Vacuum-sealed anti-static aluminum foil bags with desiccant packets.
Physical Protection: Suspended wooden crate packaging with edge-protection brackets.
Traceability: Each roll features a barcode label detailing master batch number, dimensions, production date, and test data sheet.
Lead Time: Stock items ship in 7-10 business days; custom slitting and tempers require 3-4 weeks. 

Integrated Mill Operations: In-house cold rolling, continuous annealing, surface treatment, and laser slitting maintain strict control over mechanical properties and purity.
Metallurgical Control: Continuous grain size and crystallographic orientation monitoring prevent failure during high-stress forming.
Global Compliance: Facilities certified to ISO 9001, IATF 16949, and ISO 14001, meeting automotive and electronics material traceability standards.