Precise laser spots are precisely positioned in microseconds, and robust solder joints are quietly formed—this is the manufacturing innovation brought to the Type-C interface by Fly laser welding technology.
In today's increasingly thinner and lighter electronic devices, the Type-C interface, with its convenient reversible plug-and-play design and efficient transmission capabilities, has become the mainstream choice. With the advancement of EU legislation, from the end of 2024, all new portable smart devices must use USB Type-C charging interfaces; from 2026, USB Type-C will also become the standard interface for laptop chargers.
In this wave of technological change, Feilai laser welding technology, with its advantages of high precision, high efficiency, and high stability, is becoming an indispensable key technology in the Type-C interface manufacturing process.
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01 Market Prospects: Type-C Interface Ushers in a Market Explosion Worth Hundreds of Billions
As the latest USB interface standard, the Type-C interface is approximately 8.3mm × 2.5mm in size, much smaller than other interfaces. This miniaturization makes traditional soldering methods insufficient to meet its production requirements.
The diversification of electronic product functions and the simplification of interaction are unchanging development trends. The USB Type-C interface, with its numerous advantages such as slimness, reversible insertion, fast charging, high-speed data transfer, and comprehensive compatibility with audio and video data formats, is becoming the dominant force in the market.
The General Manager of Fly Laser Technology Co., Ltd. pointed out: "Domestic consumer electronics manufacturers such as Huawei, Vivo, and Oppo basically all use laser welding; 100% of Type-C connectors require laser welding." This data fully illustrates the importance of laser welding technology in this field.
02 Technical Principles: The Precise Art of Laser Welding
Laser welding is a high-precision technology that uses a laser beam as a heat source for welding. Its basic principle is to generate a high-intensity laser beam, which is focused onto the welding area by an optical system, forming an extremely small focal point. This causes the material to be heated and melted instantly, and then cooled and solidified to form a weld.
Laser welding equipment mainly consists of an optical system, a mechanical system, and a CNC system. According to power classification, machines with an average power below 500W are generally called low-power welding machines, 500-1000W are medium-power welding machines, and above 1000W are high-power welding machines.
In Type-C interface welding, low-power welding machines are primarily used. These machines are "mainly applied to electronic components, 3C products, and the medical field, especially in Type-C or high-speed cable assemblies."
Fly Laser has a significant advantage in laser welding technology. According to Fu Yun, General Manager of Fly Laser, "Five or six years ago, customers required laser spot sizes between 0.6 mm and 0.9 mm. Now, products are becoming increasingly miniaturized, and the smallest spot size can reach 0.2 mm, or even 0.1 mm."
More importantly, Fly Laser controls welding energy fluctuations to below 3%, and can even achieve 2% or 1%, greatly improving the stability of welding quality.
03 Process Application: Key Aspects of Fly Laser in Type-C Manufacturing
In Type-C interface welding, Fly Laser mainly applies its technology in the following key aspects:
Shell Structure Welding
In Type-C processing, laser fusion welding is used to weld the Type-C fixing piece to the shell, employing spot welding at 4-8 points to enhance the tensile strength of the interface. This welding method ensures a stable connection even after repeated plugging and unplugging, significantly extending product lifespan. Laser welding machines produce small weld joints with a small heat-affected zone, preventing post-weld porosity, collapse, thermal strain, and changes in metallographic structure, greatly reducing post-weld processing steps.
Shielding Layer Treatment
Type-C cables typically use aluminum foil shielding to meet electromagnetic compatibility (EMI) requirements. Fly Laser utilizes laser cutting technology to precisely cut the aluminum foil shielding layer.
Compared to traditional knife-edge aluminum foil removal methods, laser cutting avoids damage to the core wires and prevents serrated burrs on the fracture surface, improving shielding effectiveness and product stability.
Precision Internal Welding
For welding the tiny components inside the Type-C interface, Fly Laser's low-power welding machines (below 500W) perform exceptionally well. Laser soldering, a technology that uses a high-energy-density laser beam as a heat source, melts the solder and completes the welding process through precise heat input control.
This method is particularly effective for the tiny pins and complex structures of Type-C interfaces, ensuring high-precision electrical connections.
04 Technical Advantages: Why Choose Feilai Laser Welding?
Fly laser welding technology offers multiple advantages in Type-C interface welding:
High-Precision Control: Real-time energy control, multiple welding waveform settings, precise control of focused spot size and positioning, and easy automation. The laser beam spot diameter can be precisely controlled within an extremely small range, enabling high-precision welding.
High Weld Quality: No auxiliary welding materials are required; the weld quality is high, free of porosity, and the weld strength and toughness are equivalent to or even exceed those of the base material. Laser welding produces a dense, high-strength weld with excellent sealing.
Small Heat-Affected Zone: High aspect ratio, small weld size, small heat-affected zone, and minimal material deformation. Concentrated laser welding energy minimizes the heat-affected zone on surrounding materials during welding, effectively preventing deformation of connector plastic components due to overheating.
Aesthetically Pleasing and Efficient: Smooth and aesthetically pleasing welds; no post-weld treatment or only simple post-weld processing required. Laser welding boasts high speed, enabling the connection of multiple weld points in a short time, thus improving production efficiency. General Manager Fu Yun revealed, "It can weld 20 weld points per second."
High flexibility: Laser welding can be programmed to achieve various complex welding paths and patterns, adapting to the welding needs of different types and specifications of TYPE-C USB connectors.
05 Process Parameters: Key Control for Precision Welding
To achieve ideal Type-C interface laser welding results, precise control of several process parameters is required:
Power density: Power density is one of the most critical parameters in laser processing. In conduction laser welding, the power density ranges from 10⁴ to 10⁶ W/cm².
Laser pulse waveform: The laser pulse waveform is an important issue in laser welding, especially for thin-film welding.
Defocus control: Laser welding typically requires a certain degree of defocus. When negatively defocused, the power density inside the material is higher than at the surface, easily leading to stronger melting and vaporization, allowing light energy to penetrate deeper into the material. Therefore, in practical applications, negative defocusing is used when a large penetration depth is required; positive defocusing is preferable when welding thin materials.
Welding speed: The welding speed affects the heat input per unit time. Too slow a welding speed results in excessive heat input, causing the workpiece to burn through; too fast a welding speed results in insufficient heat input, causing incomplete penetration.
With over ten years of technical accumulation in the field of laser welding, Fly Laser has provided professional laser welding solutions for industries such as electrical appliances, mobile communications, hardware products, and tool accessories.
With the further development of 5G technology, the application scenarios of Type-C interfaces will become more widespread, and the demand for laser welding technology will continue to grow. Companies like Fly Laser, which focus on technological research and development, will better serve the manufacturing needs of Type-C interfaces, driving the development of electronic devices towards thinner, more efficient, and more reliable designs.
In the future, the application scope of laser welding technology will expand from Type-C interfaces to the manufacturing of more micro-electronic components, providing support for the technological upgrade of the entire electronics industry.
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