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

2018/10/31 16:27:08 Viewers:

Ultraviolet laser marking machine and fiber laser marking machine are the mainstream laser marking equipments, which are widely used in various types of product marking packaging. Due to the application field, core components, and processing principles are different, the price of laser marking machines of different models is also very different. For example, the price of ultraviolet laser marking machine is nearly three times that of fiber laser marking machine. Today, endurance laser marking machine manufacturers tell you what is the difference between UV laser marking machine and fiber laser marking machine?

First, the laser and the principle

Ultraviolet laser marking machine: Developed by 355nm UV laser. The machine uses three-stage intracavity frequency doubling technology to compare with infrared laser. 355 UV focusing spot is very small, which can greatly reduce the mechanical deformation of the material. The laser processing heat has little effect.

Fiber laser marking machine: 1064nm wavelength is used. Regarding the laser wavelength, the shorter the general wavelength, the smaller the spot size of the laser, the higher the precision, the smaller the heat-affected zone formed during processing, and the more beautiful the processing effect.

There is also a method for processing the ultraviolet laser marking machine and a physical marking method for the laser relative to the fiber laser marking machine, and the ultraviolet laser marking machine is a chemical processing method, mainly photochemistry. The reaction is processed. The difference between the two different processing methods is that the laser physics processing method is mainly processing on the surface of products and materials, and the laser chemistry processing method can use laser to penetrate into the inside of the product material for processing.

Second, the contrast advantages of UV laser marking machine and fiber laser marking machine:

In terms of wavelength, the wavelength of the ultraviolet laser is shorter than the wavelength of visible light, so it is invisible to the naked eye. Although you can't see these laser beams, these shortwaves allow the UV laser to focus more precisely, resulting in extremely fine circuit characteristics while maintaining excellent positioning accuracy.

There is also an important factor, the lower the temperature of the workpiece, the high-energy photons present in the ultraviolet light allow the UV laser to be applied to large PCB circuit board combinations, from standard materials such as FR4 to high-frequency ceramic composites and including polyimide. Various materials such as flexible PCB materials are suitable. Absorption rates of three common PCB materials under the action of six different lasers. These six lasers include excimer lasers (wavelength 248 nm), infrared lasers (wavelength 1064 nm), and two CO2 lasers (wavelengths of 9.4 μm and 10.6 μm, respectively). An ultraviolet laser (Nd:YAG, wavelength 355 nm) is a rare laser with consistent absorption in three materials.

The UV laser marking machine exhibits a very high absorption rate when applied to resin and copper, and also has an appropriate absorption rate when processing glass. Only expensive excimer lasers (wavelength 248 nm) will achieve better overall absorption rates when processing these primary materials. The variability of this material makes UV lasers the best choice for a wide range of PCB materials in many industrial applications, from the most basic boards, circuit wiring, to advanced processes such as pocket-sized embedded chips.

The computer system of the UV laser marking machine directly from computer-aided design data to the processing board means that no intermediates are needed in the board production process. Coupled with the precise focusing of UV light, the UV laser system can implement highly versatile solutions and repeat positioning. It can be said that the positioning is accurate, which is also one of the necessary requirements of the circuit board industry.

Third, the application area:


Fiber laser marking machine: high cost performance, basically suitable for laser marking of all kinds of metal surfaces. Due to the heat generated by its beam, it is not suitable for high-precision special material marking.

Ultraviolet laser marking machine: It is especially suitable for the high-end market of ultra-fine processing. The surface of packaging bottles for cosmetics, medicines, video and other polymer materials is marked with fine effect, the marking is clean and firm, better than ink coding and no pollution; flexible Pcb board marking, dicing; silicon wafer micro-hole, blind hole processing. Among them, 80% of the data lines on the market, the adapter marking is from the UV laser marking.