As AI data centers push data transmission speeds beyond 448Gb/s PAM4, the performance of high-speed connectors has become a critical bottleneck affecting overall system stability.

Across industries such as 5G communications, AI data centers, new energy vehicle electronics, and industrial automation, demand for high-speed connectors is growing at an unprecedented pace. As the most critical step in connector manufacturing, the welding process directly determines product reliability and performance.

01 Industry Challenges

Traditional connector manufacturing is facing unprecedented production challenges. As products evolve toward miniaturization, higher density, and lower signal loss, conventional manufacturing processes are increasingly unable to meet the precision and reliability requirements of modern high-speed connectors.

Resistance welding, once widely used in the industry, has several clear limitations. Improper current control can lead to incomplete welds or material burn-through, poor impedance consistency, and limited capability for effective process monitoring.

More importantly, traditional methods struggle to handle the high reflectivity of copper materials. Copper absorbs less than 5% of conventional infrared laser energy, which often results in shallow melt pools, severe spatter, and even potential damage to laser equipment.

At the same time, welding copper also involves hot cracking risks. Copper has a high coefficient of thermal expansion, and impurities can easily form low-melting eutectics, leading to stress concentration in welded joints.

02 Advantages of Laser Welding

Compared with resistance welding, laser welding technology can achieve a first-pass yield rate of over 99%, while maintaining highly consistent electrical conductivity at the weld points. Spatter is minimal, and welding deformation is significantly reduced.

During the welding process, the temperature can be kept relatively low. Combined with precise vision-based positioning, the system ensures accurate weld locations while minimizing damage to the base material.

A major breakthrough in this field is the green disk laser developed by TRUMPF for copper processing. The absorption rate of green wavelength lasers is eight times higher than infrared, increasing copper absorption to over 40%, which greatly reduces laser reflection risks.

This technological advancement improves weld penetration stability by 30%, while significantly reducing spatter and porosity.

03 HGTECH Laser Solutions

As a pioneer and leader in industrial laser applications in China, HGTECH has been dedicated to providing laser processing solutions for various industries since its establishment in 1997.

To address the specific requirements of high-speed connector manufacturing, HGTECH leverages the technological strengths of the National Engineering Research Center for Laser Processing and multiple national key laboratories to develop industry-leading solutions.

Our laser welding systems cover a full range of power levels, supporting everything from micron-level precision welding to high-speed continuous welding, all with stable output.

HGTECH’s self-developed laser welding systems feature a real-time closed-loop power feedback control system, ensuring energy output stability within ±1% and maintaining stable laser performance for more than 10 years.

The system is equipped with multiple welding head configurations and integrated process monitoring sensors. Combined with AI algorithms, the system enables automatic pre-weld positioning, alignment correction, and post-weld inspection.

04 Application Cases

HGTECH’s laser welding technology has already been successfully integrated into the mass production lines of leading connector manufacturers, enabling micron-level precision welding of high-speed connector copper terminals.

In the automotive electronics sector, HGTECH has independently developed laser airbag weakening intelligent equipment, reaching international standards. This technology has been applied to over 50 automotive welding lines at major OEMs, including body-in-white main lines, door and hood production lines, and floor assembly lines.

For the connector industry, we have developed several specialized systems:

Laser Precision Welding System – Suitable for signal wires, ground wires, shielding components, and various connector structures, offering excellent weld consistency and high reliability.

AUTOBOT3015 3D Five-Axis Laser Cutting Intelligent Equipment – Designed for 3D processing and high-precision cutting of automotive hot-stamped components, curved metal surfaces, and tubular structures.

Large-Format High-Power Laser Bevel Cutting Intelligent Equipment – Capable of cutting aluminum plates, stainless steel, carbon steel, and non-ferrous metal sheets, enabling vertical cutting and multiple bevel types in a single process.

05 Technological Innovation

Innovation has always been the core driving force behind HGTECH’s development. The company invests no less than 5% of annual revenue in R&D, operates three overseas R&D centers, and co-established the National Engineering Research Center for Laser Processing with Huazhong University of Science and Technology.

Through close collaboration between industry, academia, and research institutions, HGTECH has led or participated in more than 50 national projects, including China’s 863 Program, National Science and Technology Support Program, and major national science and technology initiatives during the 13th Five-Year Plan. The company has also achieved over 60 “industry firsts” in China.

In the connector manufacturing sector, HGTECH’s engineering team continues to push technological boundaries with innovations such as:

Green laser welding technology that increases copper absorption by more than eight times

Intelligent vision systems capable of sub-micron positioning accuracy

Modular automated production lines integrating wire forming, cutting, welding, and AOI inspection with flexible process combinations

06 Production Benefits

By adopting HGTECH’s solutions, connector manufacturers have achieved significant improvements in production performance.

The first-pass welding yield rate exceeds 99%, representing a major improvement over traditional resistance welding methods.

Production efficiency is also greatly enhanced. Laser flying welding speeds can reach 180 mm/s, and the fastest production line cycle time can be reduced to 43 seconds.

Cost savings are substantial. Higher levels of automation reduce labor costs, minimize consumable waste, and improve equipment reliability, lowering maintenance expenses.

Product quality stability has also improved significantly. Weld points maintain consistent electrical conductivity, with minimal spatter and very low welding deformation, ensuring the high reliability required for high-speed connectors.

Integration with MES systems enables full production data connectivity, laying a solid foundation for smart manufacturing.

Conclusion

In AI data centers, massive amounts of data flow through tiny weld points inside connectors. HGTECH’s independently developed 3D five-axis laser cutting intelligent equipment has been recognized as a National Manufacturing Single Champion Product.

From laser intelligent equipment to automated production lines and smart factory solutions, HGTECH has established a comprehensive layout across the entire intelligent manufacturing value chain. Its products and solutions serve more than 80 countries and regions, delivering Chinese innovation to global manufacturing industries.

Under precise control, the sparks of welding dance with precision. In the future, connector manufacturing accuracy will evolve from microns to nanometers, and every data packet will travel along laser-shaped pathways at high speed through the digital world.