The accepted principles are two:
"Heat processing" a laser beam with a higher energy density (which is a concentrated energy flow) that illuminates the surface of the material being processed, the surface of the material absorbing laser energy, creating a thermal excitation process in the illuminated area, thereby causing the surface of the material (or The coating) rises in temperature, causing metamorphosis, melting, ablation, evaporation, and the like.
"Cold processing" (ultraviolet) photons with very high load energy 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 produce "thermal damage" 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 in the semiconductor substrate.
Comparison of different marking methods
Compared with inkjet marking, the advantages of laser marking engraving are: a wide range of applications, a variety of materials (metal, glass, ceramic, plastic, leather, etc.) can be permanently marked with high quality. No action on the surface of the workpiece, no mechanical deformation, no corrosion on the surface of the material.
Can engrave a variety of non-metallic materials. Used in clothing accessories, pharmaceutical packaging, wine packaging, architectural ceramics, beverage packaging, fabric cutting, rubber products, shell nameplates, craft gifts, electronic components, leather and other industries.
● Engravable metal and a variety of non-metallic materials. It is more suitable for some products that require fine precision and high precision.
●Applicable to electronic components, integrated circuits (IC), electrical appliances, mobile communications, hardware products, tool accessories, precision instruments, glasses and clocks, jewelry, auto parts, plastic buttons, building materials, PVC pipes, medical equipment and other industries.
●Applicable materials include: ordinary metals and alloys (all metals such as iron, copper, aluminum, magnesium, zinc, etc.), rare metals and alloys (gold, silver, titanium), metal oxides (all kinds of metal oxides), special Surface treatment (phosphating, aluminum anodizing, plating surface), ABS material (electrical appliance casing, daily necessities), ink (transparent button, printed product), epoxy resin (encapsulation and insulation of electronic components).