FPC Laser Marking: A Comprehensive Guide 1. What is FPC Laser Marking? FPC (Flexible Printed Circuit) laser marking is a non-contact, high-precision process that uses laser technology to engrave or mark text, barcodes, logos, or serial numbers on flexible circuit boards. It ensures permanent, high-resolution markings without damaging the delicate substrate. 2. Types of Lasers Used - Fiber Lasers: Ideal for marking metals (e.g., copper traces) on FPCs. - UV Lasers: Best for sensitive materials (e.g., polyimide films) due to their cold-processing capability. - Green Lasers: Suitable for high-contrast marks on thin FPC layers. 3. Key Applications - Traceability: Serial numbers, QR codes, or barcodes for tracking. - Branding: Company logos or product labels. - Functional Marks: Alignment markers, component indicators. 4. Advantages - Precision: Micron-level accuracy for fine-pitch FPCs. - Non-Destructive: No mechanical stress or chemical residues. - Durability: Resistant to wear, heat, and chemicals. - Speed: High-throughput for mass production. 5. Challenges & Solutions - Material Sensitivity: Polyimide can burn or discolor. Solution: Use UV lasers with optimized power/speed settings. - Reflective Surfaces: Copper may reflect laser beams. Solution: Adjust wavelength or use surface treatments. 6. Process Parameters - Power: Lower power (5–20W) for delicate materials. - Speed: 100–2000 mm/s depending on mark depth. - Frequency: 20–100 kHz for balance between speed and quality. 7. Industry Standards - IPC-6013: Covers FPC performance requirements. - ISO 9001: Ensures quality control in marking processes. 8. Future Trends - AI Integration: Automated parameter adjustment for different FPC designs. - Miniaturization: Femtosecond lasers for ultra-fine marks on micro-FPCs. Conclusion FPC laser marking is critical for modern electronics, enabling precise, durable identification without compromising flexibility. Choosing the right laser type and parameters ensures efficiency and quality in FPC manufacturing. Would you like details on specific FPC materials or laser systems?