Copper is widely used in electrical connectors, power electronics, battery systems, data-center hardware, and robotic equipment because of its excellent electrical and thermal conductivity. However, these same properties make copper one of the more challenging materials to weld with conventional infrared lasers.
Low infrared absorption, unstable molten pools, spatter, porosity, and inconsistent fusion can affect both welding quality and production efficiency. As copper components become smaller, thicker, and more complex, manufacturers also need faster welding processes with greater positioning flexibility.
Han’s Laser addresses these challenges with a blue-IR hybrid laser welding system combined with high-speed galvanometer scanning. The solution combines the high copper absorption of blue light with the high energy density of infrared laser technology, while the galvanometer system expands the effective welding area for high-speed precision processing.
Why Copper Is Difficult to Laser Weld
Copper has high reflectivity at common infrared laser wavelengths. As a result, conventional infrared laser welding can require higher incident power to establish a stable molten pool.
This can create several production challenges:
- Unstable laser energy absorption
- Excessive spatter
- Porosity and incomplete fusion
- Fluctuations in weld penetration
- Limited process windows
- Reduced welding speed
- Higher requirements for equipment protection
These limitations become more significant when welding high-speed connectors, copper cables, busbars, cooling components, and other parts requiring continuous or multi-point welding.
Blue-IR Hybrid Laser Welding: Combining Two Wavelengths
The blue-IR hybrid laser source combines blue and infrared laser beams to take advantage of the different absorption characteristics of each wavelength.
Blue laser energy has a significantly higher absorption rate on copper and other highly reflective metals. It can rapidly heat the material surface and establish a stable molten pool.
The infrared laser then provides higher power density for deeper penetration. This allows the process to combine the advantages of efficient surface heating and deep-penetration welding.
The result is a more stable welding process with:
- Better energy coupling into copper
- Reduced spatter
- More stable molten-pool behavior
- Improved fusion consistency
- Lower risk of incomplete welding
- Better weld appearance
- A wider process window
For high-volume copper welding, stable energy absorption is particularly important because even small variations in the process can accumulate into significant quality losses over thousands of parts.
High-Speed Galvanometer Scanning Expands Welding Capability
A major limitation of many existing blue-IR hybrid laser welding machines is their relatively small processing area.
Traditional collimated focusing configurations are well suited for localized welding, but their practical working range can restrict continuous scanning applications. Optical dispersion can also cause the blue and infrared beams to deviate from the same focal position across a larger field.
Han’s Laser developed a multi-wavelength-compatible high-speed galvanometer scanning system to address these challenges.
The system is designed to maintain coaxial blue and infrared beam output across the scanning field while minimizing optical transmission losses. This enables high-speed scanning over a substantially larger processing area.
Depending on the configuration, the system supports scanning fields from 30 × 30 mm to 150 × 150 mm, providing greater flexibility for continuous seams, multiple weld points, and larger copper components.
Large-Area Scanning for Higher Welding Throughput
Compared with conventional point-by-point welding, galvanometer scanning can rapidly move the laser beam between different welding positions without requiring large mechanical-axis movements.
This provides several advantages for production lines:
Faster Welding Cycles
High-speed beam movement reduces unnecessary mechanical motion and can shorten the cycle time for multiple weld points or continuous weld paths.
Flexible Weld Patterns
The system can process different weld geometries and positions within the scanning field, making it suitable for components with multiple connection points.
Improved Equipment Utilization
A larger effective processing area allows more welding positions to be handled within a single setup, reducing fixture changes and unnecessary part movement.
Greater Process Flexibility
The combination of galvanometer scanning and programmable laser parameters makes it easier to adapt the welding process to different component designs and production requirements.
Han’s Laser Blue-IR Hybrid Galvanometer Welding System
The Han’s Laser system integrates several key modules into a complete welding workstation, including:
- Marble machine base and linear motor stages
- Blue-IR hybrid laser source
- High-speed galvanometer scanning system
- CCD vision positioning
- Welding head assembly
- Pneumatic safety door
- Precision fixtures
The vision system identifies the workpiece position and helps compensate for positioning variations before welding. The motion platform, galvanometer scanner, laser source, and control system work together to provide repeatable welding performance.
The laser welder is particularly suitable for high-reflectivity metal applications where conventional infrared welding may encounter process instability.
Applications Across High-Tech Manufacturing
The system can be applied to a wide range of copper and high-reflectivity metal components.
Consumer Electronics
Applications include:
- Precision connectors
- Shielding components
- Copper terminals
- Small electrical components
The high-speed scanning capability is useful for compact components requiring multiple weld points within a limited cycle time.
AI Data Center Hardware
High-speed connectors, copper conductors, and liquid-cooling components increasingly require reliable welding processes.
The combination of blue-light absorption and infrared deep penetration provides a practical approach for copper components used in high-density computing infrastructure.
Power Electronics
IGBT components, busbars, terminals, and other copper conductive parts require low-resistance and mechanically reliable connections.
Stable fusion and controlled heat input help maintain connection quality while limiting unnecessary thermal effects on surrounding components.
Battery and EV Components
Copper components are widely used in battery packs, electrical connections, and power distribution systems. High-speed laser welding can support automated production where consistent electrical and mechanical connections are critical.
Robotics and Automation
Robots and automated equipment increasingly incorporate compact copper conductors and precision electrical connections. Flexible scanning makes the system suitable for complex components with multiple welding locations.
Optical and Communication Equipment
Copper and other conductive components used in communication equipment can benefit from precise, repeatable welding with controlled heat input and high process stability.
A More Flexible Approach to High-Reflectivity Metal Welding
The combination of blue-IR hybrid laser technology and high-speed galvanometer scanning addresses two important challenges in copper welding: efficient energy absorption and limited processing range.
Blue laser energy improves coupling with highly reflective copper, while infrared laser energy contributes to deep penetration. The galvanometer system then extends the usable processing field and enables high-speed beam movement.
Together, these technologies provide a more flexible solution for manufacturers looking to improve copper welding speed, consistency, and production scalability.
Conclusion
As electrical connections become smaller and production volumes continue to increase, copper welding requires more than simply increasing laser power. Stable energy coupling, precise beam control, high-speed scanning, and flexible process integration are becoming equally important.
Han’s Laser’s blue-IR hybrid galvanometer laser welding system combines these capabilities into a single solution for high-reflectivity metal processing. From connectors and copper cables to power electronics, battery components, liquid-cooling parts, and robotic equipment, the system provides a scalable approach to high-speed precision welding.