Solder paste laser welding technology uses semiconductor lasers as the light source, and the commonly used laser wavelengths are generally 915nm or 976nm. Different from the traditional solder paste soldering method, the former solder requires laser-specific solder paste. The principle is that the laser energy can be precisely controlled through the optical lens and focused on the corresponding solder joints, which belongs to the non-contact heating welding technology.

The working process of solder paste laser soldering machine

First, the laser solder paste is preheated. While the solder paste is preheating, the solder joints will also be preheated, and then the solder paste is melted into tin liquid at high temperature, so that the tin liquid can completely wet the pad, and finally form a weld. Laser solder paste welding has high energy density and high heat transfer efficiency. It is non-contact welding. It is especially suitable for welding solder joints in small spaces or precision welding of small solder joints. And for products with particularly high quality requirements, locally heated products must be used. Comply with the electronic market demand for automatic precision soldering, such as bumps on BGA outer leads, bumps on Flip chip chips, rework of BGA bumps, connection of TAB device package leads, sensors, inductors, hard disk heads, camera modules , vcm voice coil motor, CCM, FPC, optical communication components, connectors, antennas, loudspeakers, horns, heat-sensitive components, photosensitive components and other products that are difficult to weld by traditional methods, the application of laser soldering equipment is becoming more and more extensive .

Solder paste laser soldering machine advantages

1. Semiconductor laser welding system with temperature feedback: the function of temperature feedback can control the temperature of welding, and can monitor the temperature of a small area with a diameter of 0.3-1.5mm;

2. Multi-station welding system: Based on the eight-axis high-precision multi-station laser welding system, it can realize visual positioning and work well with solder paste and laser welding, and the efficiency is increased by more than 20%, which greatly improves the manufacturing capacity of the equipment;

3. Tin dispensing mechanism: High-precision solder paste dispensing mechanism, through program setting, can accurately control the amount of tin, and the control accuracy of tin amount can reach ±0.02g;

4. Visual positioning system: Automatically capture custom welding trajectory by image, which can collect multiple different feature points on the same product, greatly improving processing efficiency and precision.