Principle of Laser Marking Machine

1、 Principle of laser marking machine

Laser marking machine makes use of laser beam to make permanent marks on diverse material surfaces. the impact of marking is to expose deep substances thru evaporation of surface materials, or to "carve lines" thru chemical and bodily changes of surface materials caused by light electricity, or to reveal styles and characters to be etched by using burning some substances with mild energy.

There are two recognized principles:

The laser beam with high energy density (it is a concentrated energy flow) of "hot processing" shines on the surface of the material to be processed, the material surface absorbs the laser energy

Labeling machine

The thermal excitation process is generated in the region, so that the temperature of the material surface (or coating) will rise, resulting in deformation, melting, ablation, evaporation and other phenomena.

"Cold processing" refers to the (ultraviolet) photons with very high load energy, which can break the chemical bonds in materials (especially organic materials) or surrounding media until the materials are destroyed by non thermal processes. This kind of cold processing has special significance in laser marking processing, because it is not thermal ablation, but does not produce " The side effect of thermal damage is the cold peeling that breaks the chemical bond, so there is no heating or thermal deformation on the inner layer of the machined surface and the surrounding area. For example, excimer lasers are used in the electronic industry

Packaging machinery

A thin film of chemical substances is deposited on the semiconductor substrate, and a narrow groove is formed on the semiconductor substrate.