What is the principle of laser marking?

Author: ZIXU   Time: 2016/09/01

Now with the development of science and technology, laser technology is also in constant development,
at the same time the laser marking machine is also slowly infiltrated into the industry for the product marking.
Laser marking is a permanent mark on the surface of a variety of materials with a laser beam. Subject effect is
expose the deep material through the evaporation of surface material, or by light energy leads to the physical
surface of chemical and physical changes and carved a mark, or through the energy of light burned material part,
show the required etching patterns, text.
Two ways: "hot" and "cold"".
"Hot processing with high laser beam (it is the concentration of energy flow) irradiation on the processed material
on the surface of the, surface material absorption laser energy, in the irradiated region generate heat excitation process,
which increases the material or coating surface temperature, metamorphosis, melting, ablation, evaporation phenomenon.
"Cold processing" has a high load of energy (UV) photons, able to interrupt the material (especially organic material) or
chemical bonds around the media, to make the material occurred in the process of non thermal damage. The cold processing
in laser marking processing with special significance, because it is not thermal ablation, but does not produce side effects
of heat damage, break chemical bonds of cold strip, and the machined surface layer and the nearby area does not produce
heating or thermal deformation and so on.
In the electronic industry, for example, a thin film of a chemical substance is deposited on the substrate material, and a narrow
groove is arranged on the semiconductor substrate.
Laser marking machine can be carved metal and a variety of non-metallic materials. It is more suitable to be used in occasions
with more precise and higher precision. Used in electronic components, integrated circuits (IC), electrical appliances, mobile
communications, hardware, tools, accessories, precision instruments, watch glasses, jewelry, auto parts, plastic buttons,
building materials, PVC pipe.
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