The difference between fiber laser marking machine and UV ultraviolet laser marking machine

At present, the mainstream laser marking machines on the market generally include three types: fiber laser marking machines, ultraviolet laser marking machines and carbon dioxide laser marking machines. Our company is the manufacturer of laser marking machines. It is also the most shipped. These three types of marking machines can cover many types of product marking and packaging applications. Today, we mainly introduce what are the differences between fiber laser marking machines and UV laser marking machines? How to use it differently in practical applications?

1. Differences in wavelength and working principle

UV laser marking machine: 355nm UV laser, three-stage cavity Compared with the infrared laser, the internal frequency doubling technology has a small focusing point of the 355 ultraviolet light, which can greatly reduce the mechanical deformation of the material and has a small thermal influence on the processing.

Fiber laser marking machine: use 1064nm wavelength.

Regarding the laser wavelength, generally the shorter the wavelength, the smaller the laser spot size, the higher the precision, the smaller the heat-affected zone formed during the processing, and the better the processing effect. There are also differences between the processing method using a laser UV laser marking machine and other laser marking equipment. Usually, for CO2 laser marking machine and fiber laser marking machine, it is the physical marking method of laser, UV laser marking machine is processed by chemical treatment method, mainly photochemical reaction, the difference between the two different processing methods is laser physical processing The method is mainly to process the surface of the product and material, while the chemical processing method of the laser is the internal treatment that the laser can be used to penetrate into the product material.

2. The advantages of UV laser marking machine compared to fiber laser marking machine

In terms of wavelength, the wavelength of UV laser light is shorter than that of visible light, so it is invisible to the naked eye. While you can't see these laser beams, these short wavelengths allow the UV laser to focus properly, preserving its fine circuit properties while maintaining excellent positioning accuracy.

There is also an important factor, the lower the workpiece temperature, the high-energy photons present in the UV light can apply the UV laser to large PCB circuit board assemblies, from standard materials such as FR4 to high frequency ceramic composites, including polyimide. Various materials such as flexible PCB materials are available. Absorptivity of three common PCB materials under the action of six different lasers. The six lasers include an excimer laser (wavelength 248nm), an infrared laser (wavelength 1064nm) and two CO2 lasers (wavelength 9.4μm and 10.6μm, respectively). Ultraviolet lasers (Nd: YAG, 355 nm) are rare lasers with consistent absorption across the three materials.

UV laser marking machine has high absorption rate when applied to resin and copper, and has appropriate absorption rate when processing glass. Only expensive excimer lasers (248 nm wavelength) can achieve good total absorption when dealing with these primary materials. This material variability makes UV lasers ideal for a variety of PCB materials in many industrial applications, from substrates and circuit routing to high-end processes such as pocket-sized embedded chips.

The computer system of the UV laser marking machine directly processes the board from the CAD data meaning that no intermediates are required in the board production process. Coupled with the ability of UV focusing, UV laser systems can achieve unique solutions and repeatable positioning. It can be said that the positioning is accurate, which is also one of the requirements of the circuit board industry.

3. Different application fields

Fiber laser marking machine: cost-effective, basically suitable for a variety of metal surfaces laser marking.

UV laser marking machine: suitable for the end market of fine processing. Cosmetics, video tapes and other polymer material packaging bottles are marked with fine effects on the surface, the marking is cleaned, and the ink is sprayed without pollution; flexible PCB boards are used. Standard, cutting; silicon wafer microvia, blind via processing. Among them, 80% of the data lines and adapter markings on the market come from the UV laser marking machine produced by the company.

(This article is edited by the editor, please be sure to indicate the source:)

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