What are the advantages of uv laser 355 nm source and fiber laser marking machine?

In the field of laser marking machines, UV laser marking machines and fiber laser marking machines are the most used. What are the advantages of the two laser marking machines? Today, Bot Laser will give you a brief introduction:

In terms of wavelength, UV lasers have shorter wavelengths than visible light, so they are invisible to the naked eye. While you can't see these laser beams, it's these short wavelengths that allow UV lasers to be focused more precisely, producing extremely fine circuit characteristics while maintaining excellent positioning accuracy.

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Another important factor is that, in addition to the lower temperature of the workpiece, the presence of high-energy photons in the ultraviolet light allows the ultraviolet laser to be applied to large PCB circuit board assemblies, from standard materials such as FR4 to high-frequency ceramic composite materials and polyimide including polyimide. Various materials such as flexible PCB materials are suitable. Absorptivity of three common PCB materials under the action of six different lasers. The six lasers include an excimer laser (248 nm wavelength), an infrared laser (1064 nm wavelength), and two CO2 lasers (9.4 μm and 10.6 μm wavelengths, respectively). Ultraviolet laser (Nd:YAG, wavelength 355nm) is a rare laser with uniform absorption among the three materials.

Ultraviolet laser marking machine shows extremely high absorption rate when applied to resin and copper, and also has appropriate absorption rate when processing glass. Only expensive excimer lasers (wavelength 248nm) get better overall absorption when processing these primary materials. This material difference makes UV lasers the best choice for a variety of PCB material applications in many industrial fields, from the production of the most basic circuit boards, circuit wiring, to advanced processes such as the production of pocket-sized embedded chips.​​

The computer system of the UV laser marking machine goes directly from the computer-aided design data to the processing of the circuit board, which means that no middleman is required in the circuit board production process. Combined with the precise focusing capabilities of the UV, UV laser systems can implement very specific solutions and repeat positioning. It can be said that the positioning is accurate, which is also a necessary requirement of the circuit board industry.