Ultra Thin Coating Layer Pd Coated Copper Bonding Wire For QFN / QFP Packaging

1. Superior Oxidation Resistance

The ultra-thin palladium coating forms a dense and stable protective layer on the copper surface, effectively reducing oxidation risk during storage, handling, and high-temperature bonding processes. This significantly improves long-term reliability compared to bare copper wire.

2. Excellent Electrical Conductivity

With a high-purity copper core, Pd-coated copper wire maintains outstanding electrical conductivity, ensuring efficient signal transmission and low electrical resistance in semiconductor interconnections.

3. Cost-Effective Alternative to Gold Wire

Palladium coated copper wire provides a highly competitive replacement for gold bonding wire by significantly reducing material costs while maintaining comparable bonding performance and reliability.

4. Improved Mechanical Strength

Compared to traditional gold wire, Pd-coated copper wire offers higher tensile strength and better loop stability, making it suitable for fine-pitch, high-density, and low-loop-height packaging designs.

5. Enhanced Intermetallic Compound (IMC) Stability

The palladium layer helps regulate intermetallic compound formation at the bonding interface, reducing excessive IMC growth and minimizing the risk of brittle fracture under thermal stress.

6. High Reliability Under Harsh Conditions

Pd-coated copper wire demonstrates excellent performance in high-temperature and high-humidity environments (e.g., 85°C / 85% RH testing), making it ideal for automotive electronics, power devices, and high-reliability applications.

7. Compatibility with Existing Bonding Equipment

The material is compatible with standard automatic wire bonding systems, enabling seamless integration into existing semiconductor packaging lines without major process modifications.

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