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Small-size copper-clad aluminum strips have high dimensional accuracy and special application scenarios (such asPhotovoltaic welding ribbon, precision connectors, microelectronic circuits, etc.) have more stringent technical requirements in production and use. The following are the main technical requirements for small-sized copper-clad aluminum strips:

?? 1. Dimensional accuracy requirements

1. Thickness tolerance: ±0.005 mm or less (customizable)
2. Width tolerance: ±0.02 mm or less
3. Edge uniformity: No burrs, no cracks, no curling
4. Flatness requirements: Flat, no warping, curvature less than 1.5‰

?? 2. Composite structure quality requirements

1. Copper layer thickness：≥0.02 mm (varies according to specifications)
2. Copper layer uniformity：The copper layer thickness is evenly distributed on the strip surface, and the fluctuation shall not exceed ±10%
3. Copper-aluminum bonding strength: Must meet metallurgical bonding standards and must not peel or delaminate
4. Interface integrity: No bubbles, inclusions, or voids

?? 3. Electrical performance requirements

1. Electrical conductivity (IACS)：Generally ≥65%, high conductivity products can reach ≥75%
2. Resistivity：Must meet photovoltaic industry or electronic grade requirements (based on thickness and copper layer control)
3. Welding performance：Good tin adhesion, no oxide layer, easy to tin

?? 4. Mechanical performance requirements

1. tensile strength：Generally required to be ≥120 MPa, high strength or high ductility types can be customized according to the application
2. Elongation：≥10% (soft state), ensuring flexibility
3. Bending properties: 180° repeated bending for no less than 5 times without breakage

?? 5. Surface quality requirements

1. Surface finish: No scratches, indentations, oil stains, water stains, etc.
2. Surface oxidation control：The copper surface needs to be passivated or protected to avoid oxidation and blackening
3. No exposed aluminum on the surface: The copper layer must completely cover the aluminum core, and there must be no obvious aluminum exposure

?? 6. Packaging and storage requirements

1. Vacuum sealed or dry packed, to prevent moisture oxidation
2. Neatly roll or slice to prevent crushing or curling
3. Clear labeling, including specifications, batch number, production date, etc.

? 7. Ruichuang’s technical advantages (with examples)

• High precision rolling technology：Can achieve thickness control below 0.05mm, suitable for micro-narrow bands
• Online detection system: Real-time monitoring of copper layer thickness and bonding to ensure consistency
• Multiple annealing + leveling technology: The strip has both softness and strength, suitable for automatic welding

If you have specific specifications (such as 0.1×2mm, 0.15×4mm, etc.) and uses, I can further help you customize the recommended technical parameters or evaluate whether it is suitable. Do you want me to help you compile a list of recommended specifications?