In terms of wavelength, the wavelength of UV laser marking machine is shorter than that of visible light, so it is invisible to the naked eye. Although you can't see these laser beams, it is these short waves that enable the UV laser marking machine to focus more accurately, so as to maintain excellent positioning accuracy while producing fine circuit characteristics.

Another important factor is that in addition to the low temperature of the workpiece, the high-energy photons in the ultraviolet light enable the ultraviolet laser to be applied to large PCB circuit board combinations, from standard materials such as FR4 to high-frequency ceramic composites and flexible PCB materials including polyimide. The absorptivity of three common PCB materials under the action of six different lasers. These six lasers include excimer laser (wavelength 248 nm), infrared laser (wavelength 1064 nm), and two CO2 lasers (wavelength 9.4 respectively μ M and 10.6 μ m)。 Ultraviolet laser (Nd: YAG, wavelength 355nm) is a rare laser with the same absorption rate in three materials.

Ultraviolet laser marking machine shows extremely high absorption when applied to resin and copper, and also has appropriate absorption when processing glass. Only the expensive excimer laser (wavelength 248 nm) can obtain better overall absorption when processing these main materials. The difference of this material makes UV laser become the choice of various PCB material applications in many industrial fields, from the production of basic circuit boards, circuit wiring, to the production of pocket embedded chips and other advanced processes.

The computer system of the UV laser marking machine directly transfers the computer-aided design data to the processing of the circuit board, which means that no middleman is needed in the production process of the circuit board. Combined with the precise focusing ability of ultraviolet light, the ultraviolet laser system can implement the characteristic scheme and repeat the positioning. It can be said that the positioning is accurate, which is also one of the necessary requirements of the circuit board industry.