Laser marking is the use of a laser beam to mark permanent surfaces on a variety of different materials. The effect of marking is to expose deep substances by evaporation of surface substances, or to "engraving" traces by chemical or physical changes of surface substances caused by light energy, or to burn off some substances by light energy to show the desired etching. Pattern, text.[Laser marking works principle]
At present, there are two accepted principles: "thermal processing" a laser beam with a higher energy density (which is a concentrated energy flow) that illuminates the surface of the material being processed, and the surface of the material absorbs laser energy and is generated in the irradiated area. [Laser marking works principle]The thermal excitation process causes the temperature of the surface (or coating) of the material to rise, resulting in metamorphosis, melting, ablation, evaporation, and the like.[Laser marking works principle]
"Cold processing" (ultraviolet) photons with very high load energy that can break chemical bonds in materials (especially organic materials) or surrounding media to cause non-thermal process damage. This cold working has special significance in laser marking processing because it is not thermal ablation, but does not cause "thermal damage" [Laser marking works principle]side effects, and the cold peeling of the chemical bond is broken, so that the inner layer and the vicinity of the surface to be processed are not Produces heat or thermal deformation. For example, in the electronics industry, excimer lasers are used to deposit a thin film of a chemical on a substrate material to create a narrow trench on the semiconductor substrate.[Laser marking works principle]
Laser marking right now is most wide used in manufacturing industries, because of the flexible application, adjustable and controllable laser property, we can change the laser speed, laser power, and the time of the laser stay on material, laser frequency, these are laser its self property, otherwise we can change the using environment, paint some chemical on material then marking, put material in the water while marking, in cold or warm room, as anyway that you can try, but make sure you are safe before start marking, no need you are a professor, no need you are a engineer, there still a lot laser marking skills is waiting for your discovering.[Laser marking works principle]
What is you major in and what item you want to marking?