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The principle of laser marking-superwave fiber laser marking machine-fiber laser marker

Superwave Laser Technology Co.,Ltd | Updated: Dec 19, 2017

Laser marking is a permanent marker of laser beam on various material surfaces. Play the effect of mark is through material surface evaporation show deep material, either light energy caused by surface physical chemistry and "carve out" traces of a physical change or light energy to burn, by part of the material, show the etching patterns and text.

At present, the accepted laser marking principle is two kinds:

"Hot work" has a high energy density of laser beam, which is the focus of energy flow), by processing materials on the surface, surface absorption of laser energy, produce thermal excitation in the area of the irradiation process, so that the surface temperature rise (or coating), abnormal, melting, ablation, the phenomenon such as evaporation.

"Cold" (uv) with high load energy photons, able to break down the material (especially the organic material) or chemical bonds within the surrounding medium, to make the material in the thermal process. This cold has special significance in the laser marking processing, because it is not a thermal ablation, but does not produce "thermal damage of side effects and cold strip break chemical bonds, and thus of the processed surface layer and the area does not produce heating or thermal deformation, and so on. For example, a quasi-molecular laser is used in the electronics industry to deposit a thin film of chemicals deposited on a substrate material and a narrow slot on a semiconductor substrate.